The function g is defined by g(x)=3x^2-2 find g(4y)=?

Question

The function g is defined by g(x)=3x^2-2 find g(4y)=?

Answer 1

g(4y) tells us replace any x variable in the function with the expression, 4y.

So, g(4y) = 3(4y)^2 - 2 Remember to square the coefficient AND the variable in parentheses.

g(4y) = 3(16y^2) - 2

g(4y) = 48y^2 - 2

Hope this helps!