Common Core: High School - Algebra : Polynomial Identities and Numerical Relationships: CCSS.Math.Content.HSA-APR.C.4

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

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All Common Core: High School - Algebra Resources

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Example Questions

Example Question #224 : Arithmetic With Polynomials & Rational Expressions

Use FOIL for the following expression.

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

Possible Answers:

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

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

\(\displaystyle a^{2}\)

\(\displaystyle b^{2}\)

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

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 #62 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

\(\displaystyle \left(a + 7 b\right)^{2}\)

Possible Answers:

\(\displaystyle b^{2}\)

\(\displaystyle 7 a b + 49 b^{2}\)

\(\displaystyle a^{2} + 14 a b + 49 b^{2}\)

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

\(\displaystyle a^{2}\)

Correct answer:

\(\displaystyle a^{2} + 14 a b + 49 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 7 b\right)^{2}= \left(a + 7*b\right) \cdot \left(a + 7*b\right)\)

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.

\(\displaystyle a\cdot7 b=7 a b\)

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

\(\displaystyle a\cdot7 b=7 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 7 b\cdot7 b=49 b^{2}\)

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

\(\displaystyle a^{2} + 14 a b + 49 b^{2}\)

Example Question #231 : Arithmetic With Polynomials & Rational Expressions

Use FOIL for the following expression.

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

Possible Answers:

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

\(\displaystyle b^{2}\)

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

\(\displaystyle a^{2}\)

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

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 #232 : Arithmetic With Polynomials & Rational Expressions

Use FOIL for the following expression.

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

Possible Answers:

\(\displaystyle a^{2} + 24 a b\)

\(\displaystyle b^{2}\)

\(\displaystyle a^{2} + 24 a b + 144 b^{2}\)

\(\displaystyle 12 a b + 144 b^{2}\)

\(\displaystyle a^{2}\)

Correct answer:

\(\displaystyle a^{2} + 24 a b + 144 b^{2}\)

Explanation:

The first step is to rewrite the problem as follows.

\(\displaystyle \left(a + 12 b\right)^{2}= \left(a + 12*b\right) \cdot \left(a + 12*b\right)\)

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.

\(\displaystyle a\cdot12 b=12 a b\)

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

\(\displaystyle a\cdot12 b=12 a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle 12 b\cdot12 b=144 b^{2}\)

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

\(\displaystyle a^{2} + 24 a b + 144 b^{2}\)

Example Question #65 : 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:

\(\displaystyle a^{2}\)

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

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

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

\(\displaystyle b^{2}\)

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 #61 : Polynomial Identities And Numerical Relationships: Ccss.Math.Content.Hsa Apr.C.4

Use FOIL for the following expression.

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

Possible Answers:

\(\displaystyle a^{2}\)

\(\displaystyle b^{2}\)

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

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

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

Correct answer:

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

Explanation:

The first step is to rewrite the problem as follows.

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

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.

\(\displaystyle a\cdotb=a b\)

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

\(\displaystyle a\cdotb=a b\)

Now we multiply the last terms of each expression together.

\(\displaystyle b\cdotb=b^{2}\)

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

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

Example Question #67 : 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:

\(\displaystyle a^{2}\)

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

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

\(\displaystyle b^{2}\)

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

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 #68 : 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:

\(\displaystyle a^{2}\)

\(\displaystyle b^{2}\)

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

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

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

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 #69 : 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:

\(\displaystyle b^{2}\)

\(\displaystyle a^{2}\)

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

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

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

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 #70 : 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:

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

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

\(\displaystyle b^{2}\)

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

\(\displaystyle a^{2}\)

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.

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

All Common Core: High School - Algebra Resources

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