Réponses

2013-10-24T19:25:36+02:00
Factoriser f(x) et g(x):

f(x)= 4(x+2)² - (x-2)²=4(x²+4x+4)-(x²-4x+4)=4x²+16x+16-x²+4x-4=3x²+20x+12

g(x)= 36 - x² - 3(2x+12) + 2(x+6)²=36-x²-6x-36+2(x²+12x+36)=36-x²-6x-36+2x²+24x+72=x²+18x+72