Question

If c(x) = 4x - 2 and d(x)= x2 + 5x, what is (c.d)(x)?​

Answer 1

4x^3 + 18x^2 - 10x.

Explanation:

(c.d)(x) = (4x - 2)(x^2 + 5x)

= 4x^3 + 20x^2 - 2x^2 - 10x

= 4x^3 + 18x^2 - 10x.