ISEE Upper Level Math : How to multiply variables

Study concepts, example questions & explanations for ISEE Upper Level Math

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Example Questions

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Example Question #21 : Operations

Simplify the following expression:

Possible Answers:

Correct answer:

Explanation:

Simplify the following expression:

To begin, recall that we can multiply the coefficients just like regular integers:

To multiply variable of the same exponent, we simply add the exponents:

Now, put together the two parts and we have our answer:

Example Question #22 : Operations

Simplify the following:

Possible Answers:

Correct answer:

Explanation:

Simplify the following:

To multiple this out, we need to recall how to multiple variables with exponents, and how to multiply coefficients.

To multiple the coefficients (numbers in front) simply treat them like regular multiplications.

So far so good. 

To combine our x's, we will add the exponents. Recall that multiplying variables means you add the exponents.

Now, put those two together to get:

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