bonjour,
1) tu sais qd même developper et réduire ?
2) factoriser
E = (x-2)(2x+3)-3(x-2)
facto =
(x-2)(2x+3-3) )
(x-2)(2x)=
2x(x-2)
F = x(x-2)
2F = 2[x(x-2)]
= 2(x²-2x)
= 2x²-4x
si on developpe la facto de E = 2x(x-2) = 2x²-4x
3) E = (x-2)(2x+3)-3(x-2) = 0
x-2 = 0
x =2
2x+3 =0
2x =-3
x = -3/2