What is 5x times 3x?

5x × 3x = ?

Here we will do more than give you the solution to 5x × 3x. 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, 5 and 3 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:

5 × x × 3 × x =

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

5 × 3 = 15

x × x = x²

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

5x × 3x = 15x²

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:

5x × 3x² = 15x³

5x × 3x³ = 15x⁴

5x × 3x⁴ = 15x⁵

5x² × 3x = 15x³

5x² × 3x² = 15x⁴

5x² × 3x³ = 15x⁵

X times X Calculator
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