Question

The function g is defined by g(x) = 2x² +4.
Find g (4x).
g (4x) =
please help

Answer 1

`\mathrm{You\ just\ need\ to\ put\ }4x\ \mathrm{instead\ of\ }x\ \mathrm{in\ the\ function.}\\\mathrm{We\ know\ that\ g(}x)=2x^2+4.\\\therefore\ \mathrm{g}(4x)=2(4x)^2+4=2(16x^2)+4=32x^2+4`