Question

How do you simplify `( 5x^2 Z) (-2xz^3)`?

Answer 1

Here you can use the fact that `x^m*x^n=x^(m+n)` so you get:
`(5*-2)(x^2*x)(z*z^3)=-10x^(2+1)z^(1+3)=-10x^3z^4`