Jawabanmu

2014-09-13T15:38:08+07:00
A. (G○F)(x)
= 3(x² - 4x + 2) - 7
= 3x² - 12x + 6 - 7
= 3x² - 12x - 1

b. (F○G)(x) 
= (3x - 7)² - 4(3x-7) + 2
= (9x² - 42x + 49) - 12x + 28 + 2
= 9x² - 54x + 79