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Pre-Algebra : Pre-Algebra

Study concepts, example questions & explanations for Pre-Algebra

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11 Diagnostic Tests 177 Practice Tests Question of the Day Flashcards Learn by Concept

Example Questions

Example Question #16 : Product Rule Of Exponents

Use the product rule of exponents to simplify: 5x^6(2x^4)+2y^3(x^2+3x^2)

Possible Answers:

$7x^{2}+2y^3(4x^2)$

$10x^{10}+2y^3(3x^2)$

2x^2(5x^8+4y^3)

None of the other answers.

8x^2(2x^8+y^3)

Correct answer:

2x^2(5x^8+4y^3)

Explanation:

The product rule states that when two like bases with the same power are being multiplied, we add the powers together and preserve the base. In mathematical language, $a^m*a^n=a^{m+n}$ . If constants are present in front of either base we multiply them as usual.

5x^6(2x^4)+2y^3(x^2+3x^2)

Combine using the power rule:

$10x^{10}+2y^3(x^2+3x^2)$

Combine the parenthesis:

$10x^{10}+2y^3(4x^2)$

$10x^{10}+8y^3x^2$

Factor fully:

2x^2(5x^8+4y^3)

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Example Question #14 : Product Rule Of Exponents

Simplify the following expression:

$z^{4} \times z^{3} \times z^{-2} \times y^{3}$

Possible Answers:

$z^{7}y$

$z^{5}y^{3}$

$z^{5}y^{-3}$

$z^{-5}y^{3}$

$z^{-24}y^{3}$

Correct answer:

$z^{5}y^{3}$

Explanation:

The product rule of exponents states that we can multiply two exponents with the same base by adding the exponents. The exponents of different bases cannot be summed, therefore our term will not change.

$z^{4} \times z^{3} \times z^{-2} \times y^{3}$

$4 + 3 + \left ( -2\right ) = 5$

Therefore, the simplest form of the expression is

$z^{5} \times y^{3}$ which can be written as $z^{5}y^{3}$

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Example Question #521 : Pre Algebra

Simplify:

(x^2)(x^4)

Possible Answers:

x^8

x^6

x^2

$x^{-2}$

Correct answer:

x^6

Explanation:

When you multiply exponents with the same base, you add the exponents:

(x^2)(x^4)=x^6

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Example Question #522 : Pre Algebra

Simplify:

(y^5)(y^9)

Possible Answers:

$y^{45}$

$y^{14}$

$y^{-4}$

y^4

Correct answer:

$y^{14}$

Explanation:

When you multiply exponents with the same base, you add the exponents:

$(y^5)(y^9)=y^{14}$

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Example Question #523 : Pre Algebra

Simplify:

$(z^6)(z^{-2})$

Possible Answers:

z^8

$z^{-12}$

$z^{-4}$

z^4

Correct answer:

z^4

Explanation:

When you multiply exponents with the same base, you add the exponents:

$(z^6)(z^{-2})=z^{4}$

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Example Question #524 : Pre Algebra

Simplify:

$(a^7)(a^{-4})$

Possible Answers:

a^2

$a^{11}$

$a^{-3}$

a^3

Correct answer:

a^3

Explanation:

When you multiply exponents with the same base, you add the exponents:

$(a^7)(a^{-4})=a^3$

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Example Question #525 : Pre Algebra

Simplify:

$(b^5)(b^{-4})$

Possible Answers:

b^9

b^2

$\frac{1}{b}$

Correct answer:

Explanation:

When you multiply exponents with the same base, you add the exponents:

$(b^5)(b^{-4})=b$

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Example Question #526 : Pre Algebra

Simplify:

(c^6)(c)

Possible Answers:

c^5

c^7

c^6

c^8

Correct answer:

c^7

Explanation:

When you multiply exponents with the same base, you add the exponents:

(c^6)(c)=c^7

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Example Question #527 : Pre Algebra

Simplify:

$(d^{13})(d^6)$

Possible Answers:

d^5

$d^{19}$

$d^{14}$

d^7

Correct answer:

$d^{19}$

Explanation:

When you multiply exponents with the same base, you add the exponents:

$(d^{13})(d^6)=d^{19}$

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Example Question #528 : Pre Algebra

Simplify:

(x^2y)(x^4y^3)

Possible Answers:

x^7y^2

x^8y^3

$\frac{1}{x^2y^2}$

x^6y^4

Correct answer:

x^6y^4

Explanation:

When you multiply exponents with the same base, you add the exponents:

(x^2y)(x^4y^3)=x^6y^4

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Pre-Algebra : Pre-Algebra

Study concepts, example questions & explanations for Pre-Algebra

All Pre-Algebra Resources

Example Questions

Example Question #16 : Product Rule Of Exponents

Example Question #14 : Product Rule Of Exponents

Example Question #521 : Pre Algebra

Example Question #522 : Pre Algebra

Example Question #523 : Pre Algebra

Example Question #524 : Pre Algebra

Example Question #525 : Pre Algebra

Example Question #526 : Pre Algebra

Example Question #527 : Pre Algebra

Example Question #528 : Pre Algebra

All Pre-Algebra Resources

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