Sagot :
1)
[tex]( 6x -5)(2x + 3) - (6x -5)(x+2) [/tex]
[tex]= (x+1)(6x-5) [/tex]
2)
(6x-5)(x+1) =0
donc 2 solutions
x = 5/6 ou x = -1
3)
[tex](6\times4-5)(4+1) = (24-5)\times(5) = 21\times5 = 105 [/tex]
[tex]A = 4x^2 - 24x+36 = 4(x-3)^2 [/tex]
[tex]B = (7x-2)^2 - 25 = 7(x-1)(7x+3) [/tex]
En espérant t'avoir aidé.
G = (6x -5)(2x +3) - (6x -5)(x +2)
G= (12 x² +18x -10x -15) - (6x² +12x -5x -10)
G = 12x² +8x -15 - (6x² +7x -10)
G = 12x² +8x -15 -6x² -7x +10
G = +6x² +x -5
2) (6x-5) = 0
6x = +5
x = 5/6
(x+1) = 0
x = -1
les solutions de l'équation sont 5/6 et -1
A = 4x² -24 +36 = (2x -6)²