Question

If h(x) = x – 7 and g(x) = x2, which expression is equivalent to ?
(5 – 7)2
(5)2 – 7
(5)2(5 – 7)
(5 – 7)x2

Answer 1

Answer:

Option A.

Step-by-step explanation:

The given question is incomplete. Let as consider we need to find $(g\circ h)(5)$

The given functions are  

$h(x)=x-7$

$g(x)=x^2$

We need to find the expression for $(g\circ h)(5)$.

$(g\circ h)(5)=g(h(5))$

$(g\circ h)(5)=g(5-7)$         $[\because h(x)=x-7]$

$(g\circ h)(5)=(5-7)^2$         $[\because g(x)=x^2]$

Therefore, the correct option is A.