Réponse :
bonsoir
exo3
3x+2+2x-4-5x=-2
-5-4x+5y-2y+6x=2x+3y-5
5z-4x-3y+5+4x+6y-z=3y+4z+5
4x²+4y+4z-16-4x-4y-4z=4x²-4x-16
12z-4-5x²+1z+3z+y-5w=-5x²-5w+y+16z-4
ex4
(2x-3x²+5y)-(y²+2x)=2x-3x²+5y-y²-2x=-3x²-y²+5y
-(4x-3y-3)-(3x+4z)-(4x-3y+4z)=-4x+3y-3-3x-4z-4x+3y-4z=-11x+6y-8z-3
-(4x-5x²+3y-4y²)+2-4x²+(2x²-3)+4(x-x²-y²=-4x+5x²-3y+4y²+2-4x²+2x²-3-4x+4x²+4y²=7x²+8y²-8x-3y+3
ex5
2x+4+1+4x-5x²+3x²-5=6x-2x²
5(1+x²)-2(x+y²)=5+5x²-2x-2y²
2x+2x²-3(x+5y)=-x-15y+2x²
Explications étape par étape
