Here we will do more than give you the solution to 4x × 2x. 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, 4 and 2 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:
4 × x × 2 × x =
So now you can multiply what are the same. You can multiply the coefficients together and the x variables together as follows:
4 × 2 = 8
x × x = x^{2}
Then you put the answers together and make the multiplication sign invisible again to get the following answer:
4x × 2x = 8x^{2}
Do you think you can do it on your own now? If so, try the next problem on our list:
What is 4x times 3x

