Question

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

Answer 1

Answer:

$h(x) = {x}^{2} - 2 \\ h(2z) = {(2z)}^{2} - 2 \\ = 4 {z}^{2} - 2 \\ = 2( {2z}^{2} - 1)$