Réponses

2013-11-03T12:22:17+01:00
1) 25x² + 70x + 49 - 9x²+ 12x - 4 = 16x² + 82x + 45
2) (5x+7 - 3x+2)(5x+7 + 3x-2) = (2x+9)(8x+5)
E(-3) = 3.-19 = -57