Bonsoir,
= 40x -5x² -24 +3x
= -5x² +43x -24
Simplifier :
D = (5x-3)(8-x)
D = 5x×8-5x×x-3×8-3×(-x)
D = 40x-5x×x-3×8-3×(-x)
D = 40x-5x²-3×8-3×(-x)
D = 40x+5x²-24-3×(-x)
D = 40x+5x²-24+3x
D = 43x-5x²-24
↳ Loi commutative
D = -5x²+43x-24
Bonne soirée.
