Jawabanmu

2014-02-26T21:25:37+07:00
((fog)oh)(x) = (fog)(h(x)) = (fog)(x+3) = f(g(x+3)) = f((x+3)^2+ 5) = f(( x^{2} +6x+9)+5) = f( x^{2} +6x+14) = 3( x^{2} +6x+14) + 1 = 3 x^{2}  + 18x + 42 + 1 = 3 x^{2} + 18x + 43