Réponses

2013-10-03T17:49:54+02:00
A= x²+2x-2x-4=x²-4
B = 25+5y-5y-y²= 25-y²
C = 9x²-15x+15x-25=9x²-25
D = 100+70z-70z-49z²=100-49z²
E = 25-20g+20g-16g²=25-16g²
F = 4,41x²+6,3x-6,3x-9=4,41x²-9
G = 4i²-12,2i+12,2i-37,21=4i²-37,21