Bonjour
D=(7x+1)(x+4)
D=7x²+28x+x+4
D=7x²+29x+4
E=(6-5x)(-3+4x)
E=-18+24x+15x-20x²
E=-20x²+39x-18
F=(6x-5)(5-6x)
F=30x-36x²-25+30x
F=-36x²+60x-25
G=(10x-8)²
G=100x²-160x+64
H=(-3x+7)(5-4x)
H=-15x+12x²+35-28x
H=12x²-43x+35
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Bonjour
D=(7x+1)(x+4)
D=7x²+28x+x+4
D=7x²+29x+4
E=(6-5x)(-3+4x)
E=-18+24x+15x-20x²
E=-20x²+39x-18
F=(6x-5)(5-6x)
F=30x-36x²-25+30x
F=-36x²+60x-25
G=(10x-8)²
G=100x²-160x+64
H=(-3x+7)(5-4x)
H=-15x+12x²+35-28x
H=12x²-43x+35