Réponses

2013-11-09T10:51:48+01:00
(2x-1)²+(x+1)²
4x²-4x+1+x²+2x+1
5x²-2x+2

2(1-x)(2x+7)
(2-2x)(2x+7)
4x+14-4x²-14x
-4x²-10x+14

x+2(x-5)+8(3-2x)
x+2x-10+24-16x
-13x+14

(x-1)(x+2)-(2x+5)²
(x²+2x-x-2)-(4x²+20x+25)
x²+2x-x-2-4x²-20x-25
-3x²-19x-27