coucou
A. (x - 3)(2x + 1 ) + (x - 3 ) ( 5x - 7 )
A = (x-3)(2x+1+5x-7)
A = (x-3)(7x-6)
B. ( 5x - 6 )( 11x + 6 ) + 8(11x + 6)
B = (11x+6)(5x-6+8)
B = (11x+6)(5x+2)
C. ( 7x² - 5 )(3x + 9 ) + (7x - 12)(3x + 9)
C = (3x+9)(7x²-5+7x-12)
C = (3x+9)(7x²+7x-17)
D. (8x - 5)(14x + 5) + (14x + 5)²
D = (14x+5)(8x-5+14x+5)
D = (14x+5)*22x
* = fois
voila j espere t avoir aider