High School Math : Polynomials

Study concepts, example questions & explanations for High School Math

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Example Questions

Example Question #1 : Polynomials

Simplify the exponential expression below.

\(\displaystyle (2^{4})^{6}\)

Possible Answers:

\(\displaystyle 48\)

\(\displaystyle 12^{4}\)

\(\displaystyle 2^{24}\)

\(\displaystyle 2^{10}\)

\(\displaystyle 2^{2}\)

Correct answer:

\(\displaystyle 2^{24}\)

Explanation:

The power rule of exponents states that when an exponential term is raised to another power, we multiply the exponents to simplify.

\(\displaystyle (2^{4})^{6}=2^{4*6}=2^{24}\)

Example Question #2 : How To Use The Power Rule For Exponents In Pre Algebra

What is the value of \(\displaystyle (X^2)^4\)?

Possible Answers:

\(\displaystyle X^6\)

\(\displaystyle X^8\)

\(\displaystyle X^2\)

\(\displaystyle X\)

\(\displaystyle X^5\)

Correct answer:

\(\displaystyle X^8\)

Explanation:

The power rule says that an exponent to the power of another exponent gets multiplied.  We can think of \(\displaystyle (X^2)^4\) as \(\displaystyle X^2 \times X^2 \times X^2 \times X^2\), in which case we see that the answer is \(\displaystyle X^8\) because multiplying the same numbers with different exponents adds the exponents.

Example Question #2 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify \(\displaystyle (x^{4})^{3}\).

Possible Answers:

\(\displaystyle x^4\)

\(\displaystyle x^{12}\)

\(\displaystyle x^{7}\)

\(\displaystyle x^3\)

Correct answer:

\(\displaystyle x^{12}\)

Explanation:

When raising a polynomial to a power you multiply the polynomial inside the parentheses by the power outside of the parentheses.

If you think about it \(\displaystyle (x^{4})^{3}\)is equivalent to \(\displaystyle (x*x*x*x)(x*x*x*x)(x*x*x*x)\)

So we multiply \(\displaystyle 4\) by \(\displaystyle 3\) to get the power of the answer \(\displaystyle 12\)

The answer is \(\displaystyle x^{12}\).

Example Question #2 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify the expression.

\(\displaystyle (y^4)^5\)

Possible Answers:

\(\displaystyle y^9\)

\(\displaystyle y^2^0\)

\(\displaystyle 20y\)

\(\displaystyle y^1\)

\(\displaystyle 5y^4\)

Correct answer:

\(\displaystyle y^2^0\)

Explanation:

The power rule of exponents states than an exponential term raised to another exponent can be simplified by multiplying the exponents together.

\(\displaystyle (y^4)^5\)

\(\displaystyle (y)^{4*5}\)

\(\displaystyle y^{20}\)

Example Question #4 : How To Use The Power Rule For Exponents In Pre Algebra

What is \(\displaystyle (x^{6})^{8}\) simplified?

Possible Answers:

\(\displaystyle x^{\frac{6}{8}}\)

\(\displaystyle x^{14}\)

\(\displaystyle x^{2}\)

\(\displaystyle x^{48}\)

Correct answer:

\(\displaystyle x^{48}\)

Explanation:

When raising a polynomial to a power you multiply the polynomial inside the parentheses by the power outside of the parentheses.

So we multiply \(\displaystyle 6\) by \(\displaystyle 8\) to get the power of the answer as \(\displaystyle 48\).

The answer is \(\displaystyle x^{48}\).

Example Question #2 : How To Use The Power Rule For Exponents In Pre Algebra

What is \(\displaystyle (x^{5})^{9}\) simplified?

Possible Answers:

\(\displaystyle x^{45}\)

\(\displaystyle x^{14}\)

\(\displaystyle x^{29}\)

\(\displaystyle x^{4}\)

Correct answer:

\(\displaystyle x^{45}\)

Explanation:

When raising a polynomial to a power, you multiply the exponent inside the parentheses by the power outside of the parentheses.

So we multiply \(\displaystyle 5\) by \(\displaystyle 9\) to get the power of the answer, which is \(\displaystyle 45\).

The answer is \(\displaystyle x^{45}\).

Example Question #2 : Polynomials

What is the value of 93?

Possible Answers:

\(\displaystyle 490\)

\(\displaystyle 12\)

\(\displaystyle 729\)

\(\displaystyle 19,683\)

\(\displaystyle 27\)

Correct answer:

\(\displaystyle 729\)

Explanation:

Exponents are a way of expressing the repeated multiplication of the same value. An exponent describes how many times a value is to be multiplied by itself.

\(\displaystyle 9^{3}=9\cdot 9\cdot 9=729\)

Example Question #3 : Polynomials

Which of the following is an alternate positive expression of 4-3?

Possible Answers:

\(\displaystyle 4^{3}/1\)

\(\displaystyle 4^{3}\)

\(\displaystyle 3^{4}\)

\(\displaystyle 1/4^{-3}\)

\(\displaystyle 1/4^{3}\)

Correct answer:

\(\displaystyle 1/4^{3}\)

Explanation:

You can simplify negative exponents in order to work only with positive numbers. Simply make the negative number positive and divide 1 by the entire expression.

\(\displaystyle 4^{-3}=1/4^{3}\)

Example Question #4 : How To Use The Power Rule For Exponents In Pre Algebra

Simplify \(\displaystyle (x^{5})^{12}\)

Possible Answers:

\(\displaystyle x^{17}\)

\(\displaystyle x^{-7}\)

\(\displaystyle x^{60}\)

\(\displaystyle x^{7}\)

Correct answer:

\(\displaystyle x^{60}\)

Explanation:

When raising an exponent to another exponent you multiply the exponent inside the parentheses by the exponent outside of the parentheses.

So we multiply \(\displaystyle 5\) by \(\displaystyle 12\) to get the final exponent, which is \(\displaystyle 60\).

The answer is \(\displaystyle x^{60}\).

Example Question #4 : Polynomials

Simplify \(\displaystyle (x^{5})^{4}\).

Possible Answers:

\(\displaystyle x^{9}\)

\(\displaystyle x\)

\(\displaystyle x^{20}\)

\(\displaystyle 4x^{5}\)

Correct answer:

\(\displaystyle x^{20}\)

Explanation:

When raising a polynomial to a power, multiply the polynomial inside the parentheses by the power outside of the parentheses.

We multiply \(\displaystyle 5\) by \(\displaystyle 4\) to get the power of the answer, \(\displaystyle 20\).

The answer is \(\displaystyle x^{20}\).

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