Given f(x) = 2x2 + 5x + 1 and g(x) = x − 7, identify g(f(4)).

Answer 1

You can plug in f(x) wherever you see `x` in the g equation and then solve by plugging in x:

f(x) - 7 => 2*x² +5x + 2 - 7 => 2*(4)² +5*(4) + 2 - 7

Answer 2

Determine f(4) = some number N.

g(N) = ?