Question

The function g is defined by g(x)=2x^2-3.
Find g(2y)

Answer 1

g(2y) = 8y^2 -3

Explanation:

g(x)=2 x^2 -3

Let x=2y

g(2y) = 2 (2y)^2 -3

= 2 (4y^2) -3

= 8y^2 -3