Svp! Exercice 1et 2!! Svp!

A = -2a(4a+8) +2(2a+10)
A = -8a² -16a +4a +20

B = (30+24x)(1-x)-13x
B = 30 - 30x +24x -24x² -13x
B = -24x² -19x +30

C = (4x-5)2x +8
C = 8x² -10x +8

D = (3x+5)(2x+4) -(6x+3)(3-2y)
D = 6x² +12x +10x +20 -18x +12xy -9 +6y
D = 6x² +4x + 12xy + 6y + 11

E = (x-1)(-5x+2)
E = -5x² +2x + 5x -2
E = -5x² +7x -2