Réponses

2014-02-28T21:17:51+01:00
A = (3x-1)(2x+5) - (3x-1)(3x-1)
A = (3x-1)(2x+5-3x+1)
A = (3x-1)(-x+6)
A = -3x
²+x+18x-6
A = -3x
²+19x-6
x=
2+1
A = -3(
2+1)(2+1) + 19(2+1) - 6
A = -3(2+
2+2+1) + 192+19-6
A = -3(3+2
2) +192 + 13
A = -9 -6
2 +192 +13
A = 4 +13
2
A = (3x-1)(2x+5) - (3x-1)(3x-1)
A = (3x-1)(2x+5-3x+1)
A = (3x-1)(-x+6)
x=6
A = 17 * 0 = 0
x=1/3
A = 0 * (-1/3 +6) = 0