Common Core: High School - Algebra : High School: Algebra

Study concepts, example questions & explanations for Common Core: High School - Algebra

varsity tutors app store varsity tutors android store

All Common Core: High School - Algebra Resources

8 Diagnostic Tests 97 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #31 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 2 b\right)^{2}\)

Possible Answers:

\(\displaystyle a^{2} + 4 a b\)

\(\displaystyle a^{2} + 4 a b + 4 b^{2}\)

\(\displaystyle 2 a b + 4 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 4 a b + 4 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 2 b\right)^{2}= \left(a + 2*b\right) \cdot \left(a + 2*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot2 b=2 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot2 b=2 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 2 b\cdot2 b=4 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 4 a b + 4 b^{2}\)

Example Question #41 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 9 b\right)^{2}\)

Possible Answers:

\(\displaystyle 9 a b + 81 b^{2}\)

\(\displaystyle a^{2} + 18 a b + 81 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 18 a b\)

\(\displaystyle b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 18 a b + 81 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 9 b\right)^{2}= \left(a + 9*b\right) \cdot \left(a + 9*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot9 b=9 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot9 b=9 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 9 b\cdot9 b=81 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 18 a b + 81 b^{2}\)

Example Question #42 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 18 b\right)^{2}\)

Possible Answers:

\(\displaystyle b^{2}\)

\(\displaystyle 18 a b + 324 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 36 a b\)

\(\displaystyle a^{2} + 36 a b + 324 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 36 a b + 324 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 18 b\right)^{2}= \left(a + 18*b\right) \cdot \left(a + 18*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot18 b=18 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot18 b=18 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 18 b\cdot18 b=324 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 36 a b + 324 b^{2}\)

Example Question #43 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 8 b\right)^{2}\)

Possible Answers:

\(\displaystyle a^{2} + 16 a b\)

\(\displaystyle b^{2}\)

\(\displaystyle 8 a b + 64 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 16 a b + 64 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 16 a b + 64 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 8 b\right)^{2}= \left(a + 8*b\right) \cdot \left(a + 8*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot8 b=8 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot8 b=8 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 8 b\cdot8 b=64 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 16 a b + 64 b^{2}\)

Example Question #44 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 4 b\right)^{2}\)

Possible Answers:

\(\displaystyle a^{2}\)

\(\displaystyle 4 a b + 16 b^{2}\)

\(\displaystyle a^{2} + 8 a b\)

\(\displaystyle b^{2}\)

\(\displaystyle a^{2} + 8 a b + 16 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 8 a b + 16 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 4 b\right)^{2}= \left(a + 4*b\right) \cdot \left(a + 4*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot4 b=4 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot4 b=4 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 4 b\cdot4 b=16 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 8 a b + 16 b^{2}\)

Example Question #44 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 19 b\right)^{2}\)

Possible Answers:

\(\displaystyle 19 a b + 361 b^{2}\)

\(\displaystyle a^{2} + 38 a b + 361 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 38 a b\)

\(\displaystyle b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 38 a b + 361 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 19 b\right)^{2}= \left(a + 19*b\right) \cdot \left(a + 19*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot19 b=19 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot19 b=19 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 19 b\cdot19 b=361 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 38 a b + 361 b^{2}\)

Example Question #45 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 15 b\right)^{2}\)

Possible Answers:

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 30 a b + 225 b^{2}\)

\(\displaystyle b^{2}\)

\(\displaystyle a^{2} + 30 a b\)

\(\displaystyle 15 a b + 225 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 30 a b + 225 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 15 b\right)^{2}= \left(a + 15*b\right) \cdot \left(a + 15*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot15 b=15 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot15 b=15 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 15 b\cdot15 b=225 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 30 a b + 225 b^{2}\)

Example Question #46 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 16 b\right)^{2}\)

Possible Answers:

\(\displaystyle b^{2}\)

\(\displaystyle a^{2} + 32 a b + 256 b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 32 a b\)

\(\displaystyle 16 a b + 256 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 32 a b + 256 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 16 b\right)^{2}= \left(a + 16*b\right) \cdot \left(a + 16*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot16 b=16 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot16 b=16 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 16 b\cdot16 b=256 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 32 a b + 256 b^{2}\)

Example Question #45 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 6 b\right)^{2}\)

Possible Answers:

\(\displaystyle b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 12 a b\)

\(\displaystyle a^{2} + 12 a b + 36 b^{2}\)

\(\displaystyle 6 a b + 36 b^{2}\)

Correct answer:

\(\displaystyle a^{2} + 12 a b + 36 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 6 b\right)^{2}= \left(a + 6*b\right) \cdot \left(a + 6*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot6 b=6 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot6 b=6 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 6 b\cdot6 b=36 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 12 a b + 36 b^{2}\)

Example Question #46 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 14 b\right)^{2}\)

Possible Answers:

\(\displaystyle b^{2}\)

\(\displaystyle a^{2}\)

\(\displaystyle a^{2} + 28 a b + 196 b^{2}\)

\(\displaystyle 14 a b + 196 b^{2}\)

\(\displaystyle a^{2} + 28 a b\)

Correct answer:

\(\displaystyle a^{2} + 28 a b + 196 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 14 b\right)^{2}= \left(a + 14*b\right) \cdot \left(a + 14*b\right)\)

Now we multiply the first parts of the first and second expression together.

\(\displaystyle a\cdota=a^{2}\)

Now we multiply the first term  of the first expression with the second term of the second expression.

\(\displaystyle a\cdot14 b=14 a b\)

Now we multiply the second term of the first expression with the first term of the second expression.

\(\displaystyle a\cdot14 b=14 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 14 b\cdot14 b=196 b^{2}\)

Now we add all these results together, and we get.

\(\displaystyle a^{2} + 28 a b + 196 b^{2}\)

All Common Core: High School - Algebra Resources

8 Diagnostic Tests 97 Practice Tests Question of the Day Flashcards Learn by Concept
Learning Tools by Varsity Tutors