Question

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

Answer 1

the answer is D because

Explanation:

c(d(x))=4(d(x))-2 ... replace every x with d(x)

c(d(x))=4(x^2+5x)-2 ... replace the d(x) on the right side with x^2+5x

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

c(d(x))=4x^2+20x-2