How do you do this problem 3x times x squared

3x^2

3x times x is 3x, and squared which is basically doubled.

both variables are x

pretend there is an imaginary 1 in front of the x for x squared

3 x 1 = 3

x^2 x X = x^3

this is because when multiplying numbers with the same variable like this problem for instance then you add the squared (2) with the x (imaginary 1)

so 3x^3 is the answer