What is 7x times 15x?

7x × 15x = ?

Here we will do more than give you the solution to 7x × 15x. We will also explain and teach you how we came up with the answer, so you can understand it and solve similar problems in the future without help.

In this problem, 7 and 15 are the coefficients and two Xs are the variables. When a coefficient is next to a variable there is an invisible multiplication sign. So you could rewrite the problem as follows:

7 × x × 15 × x =

So now you can multiply what are the same. You can multiply the coefficients together and the x variables together as follows:

7 × 15 = 105

x × x = x²

Then you put the answers together and make the multiplication sign invisible again to get the following answer:

7x × 15x = 105x²

If you multiply two same variables with exponents, you simply keep the variable and add the exponents. Also x with no exponent is the same as x¹.

Here are some problems with answers that you should know based on what you learned on this page:

7x × 15x² = 105x³

7x × 15x³ = 105x⁴

7x × 15x⁴ = 105x⁵

7x² × 15x = 105x³

7x² × 15x² = 105x⁴

7x² × 15x³ = 105x⁵

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