Jawabanmu

2014-06-06T15:29:46+07:00
(g o f(x)) = 50x2 + 105x + 45
2014-06-06T15:32:04+07:00
Gof (x) = 2.(5x+4)2 + 5.(5x+4)-7
=2. 10x2 + 40x + 8 + 25x + 20 - 7
= 20x2 + 40x +25x +8+20-7
= 20x2 + 65x +21