Question

I cannot figure out how to solve this (2x^9y^7z)(2x^4z^3)

Answer 1

2 × 2 = 4 ;
x^9 × x^4 = x^13 ;
y^7 = y^7 ;
z × z^3 = z^4 ;
(2x^9y^7z)(2x^4z^3) =4x^13y^7z^4 ;