Sagot :
A = (4x x 3x) x ( 4x x 7) (-1 x 3x) (-1 x 7)
= 12x^2 + 28x -3x -7
= 12x^2 + 25x -7
= 12x^2 + 28x -3x -7
= 12x^2 + 25x -7
A= (4x-1)(3x+7)
4x*3x+4x*7-3x-7
12x^2 +28x-3x-7
SOLUTION: 12x^2 +25x-7
B= (5x-4)^2 =(5x-4)(5x-4)
(5x-4)^2 =(5x-4)^2
x appartient à R
Bonne journée!
4x*3x+4x*7-3x-7
12x^2 +28x-3x-7
SOLUTION: 12x^2 +25x-7
B= (5x-4)^2 =(5x-4)(5x-4)
(5x-4)^2 =(5x-4)^2
x appartient à R
Bonne journée!