If f(x)=3x2−5f(x) = 3x^2 - 5f(x)=3x2−5, find f(2x)f(2x)f(2x).
12x2−512x^2 - 512x2−5
6x2−56x^2 - 56x2−5
6x2−106x^2 - 106x2−10
12x2−2012x^2 - 2012x2−20