Bonsoir,je voudrais de l'aide pour cet exercice. ª=carré. Factoriser les expressions. A=(-7x-6)(x+5)+(8x-9)(x+5) B=5(5-2x)(x+1)+5(8x-5)(x+1) C=6(x+1)(3x-2)-2(2-

A=(x+5)*(-7x-6+8x-9)
= (x-5)*(x-15)
B=(x+1)*(5*(5-2x)+5(8x-5)
=(x+1)*(15-10x+40x-25)
=(x+1)*(30x-10)
C=(x+1)*(6*(3x-2)+2*(2-5x))
=(x+1)*(18x-12+4-10x)
=(x+1)*(8x-8)
D=16*(x-1)*(x-1)-8*(x-1)(x+5)
=(x-1)*(16*(x-1)-8(x+5)
=(x-1)*(16x-16-8x-40)
=(x-1)*(8x-56)
E=16x²-7²
=(16x+7)*(16x-7)
:)