Salut pouvez vous m'aider a resoudre cette expression A(x)= 4(x-1)²-9

bonjour,

4(x-1)²-9
[2(x-1)-3][2(x-1)+3] =0
(2x-2-3)(2x-2+3) =0
(2x-5)(2x+1) = 0
2x-5 =0
2x = 5
x = 5/2

2x+1 = 0
2x =-1
x =-1/2