a) (x-1) (2x+5)
B) (-4×3x) (5x-9)
C) (-x+1) (x -1)
D) (-3-2x) (-6-3x)
bonsoir
E) 4-2x(3x+5)= 4-2x×3x-2x×5
=4-6x²-10x
F) (-4×3x)(x×9)=(-12x)×(9x)
=-108x²
G) (3x+9)2 =2×3x+2×9
=6x+18
H) (7x-8)(4x-6)+10 =7x×4x-7x×6-8×4x+8×6+10
=28x²-42x-32x+48+10
=28x²-74x+58