(f)(g) (x) f(x)= -x^2+2 g(x)=3x^2+2x-1

I need to multiply these together

I know its setup as follows

(x^2+2)(3x^2+2x-1)

I know x^2 has to be multiplied to everything in the "( )" first.

I get -3x^4 but then the next thing that needs to be done is multiply -x^2 by 2x. However, according to my calculus teacher, u cant multiply a number that is squared by a number thats not, do I simply bring it down as -x^2(2x) and continue.. if so what is the final result?