Question

(7k-4)(7k^2+4k-1) mulityply the polynomials

Answer 1

49k^3 -23k -4

Explanation:

The distributive property is your friend.

`(7k-4)(7k^2+4k-1)=7k(7k^2+4k-1)-4(7k^2+4k-1)\\\\=49k^3+28k^2-7k-28k^2-16k+4\\\\=49k^3+k^2(28-28)+k(-7-16)-4\\\\=\boxed{49k^3-23k-4}`