Question

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

4x³ + 18x² – 10x
x² + 9x-2
16x² + 4x-6
4x² + 20x-2

Answer 1

`4x^2+20x-2`

Explanation:

To find (c.g)(x) we basically use the function d(x) as your variable, x, and plug it into c(x). So we replace every x in c(x) with the function d(x),
`x^(2) +5x`

c(g(x))=4(x^{2} +5x)-2

c(g(x))4
`x^2`+20x-2