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Given that f(x)=2x23 and g(x)=x+1 where ...

Given that f(x)=2x23 and g(x)=x+1 where xR. Find g o f(x).

A.

2(x21)

B.

2x2+4x1

C.

2x2+6x1

D.

3(x21)

Correct answer is A

f(x)=2x23;g(x)=x+1

gof(x)=g(2x23)

= 2x23+1=2x22=2(x21)