Question

The function h is defined by h (x)=x²-5.
Find h (2x).

Answer 1

4x^2 - 5.

Explanation:

h(x) = x^2 - 5

Replace the x in h(x) by 2x:

h(2x) = (2x)^2 - 5

= 4x^2 - 5.