Bonjour,
-4(-5x+2) = 20x-8 D
-2(-4-10x) = 8+20x = 20x+8 E
2x(3x-4) = 6x²-8x C
-3x(2-5x) = -6x+15x² = 15x²-6x H
(3x-1) × 6x = 18x²-6x A
5x-2x(4x-3) = 5x-8x²+6x = -8x²+11x I
(2x+1)(4x+5) = 8x²+10x+4x+5 = 8x²+14x+5 B
(5x-2)(3-2x) = 15x-10x²-6+4x = -10x²+19x-6 G
