Question

If f(x) = 2x2, and 2f(3a) = 144, then what could be the value of a ?

Answer 1

\[\large f(x) = 2x^2\]


\[\large 2*f(x) = 2*2x^2\]


\[\large 2*f(x) = 4x^2\]


\[\large 2*f(3a) = 4(3a)^2\]


\[\large 144 = 4(3a)^2\]


I'll let you finish up.