- (53x+1)(6x-9)-(2x-3)²
318x²-477x+6x-9-4x² -12x +9
314x²-471x
2)x=0 318 x 0² - 473 x 0
0
x=3/2 318 x (3/2)² - 473 x 3/2 -
1431 - 473
958
3) 6x-9
3(2x-3)
D=(53x+1)(6x-9)-(2x-3)²
(53x+1)x3(2x-3)-(2x-3)²
(2x-3)[(53x+1)x3 - (2x-3)]
(2x-3) (159x+3-2x-3)
(2x-3) ( 157x +2)
- (53x+1)(6x-9)-(2x-3)²=0
53x+1=0 6x-9=0 -2x-3=0
x=-1/53 x= 9/6 x=-2/3
=3/2
c possible qil y et ds erreur kar a l ordi c pas facile
M