Réponses

2013-12-02T15:56:23+01:00
1)(8x+5)(2x-7)+(2x-7)²
16x²-56x+10x-35+4x²-28x+49
20x²-74x+14
2)(8x+5)(2x-7)+(2x-7)²
(2x-7)(8x+5)+(2x-7)
(2x-7)(8x+5+2x-7)
(2x-7)(10x-2)
3) x=-2
(8x+5)(2x-7)+(2x-7)²
(-16+5)(-4-7)+(-4-7)²
(-9)(-11)+(-11)²
99+121=220