Réponse :
bonjour
3(x+2)=3x+6
7(x-6)=7x-42
1(x+5)=x+5
4(5-x)=20-4x ou -4x+20
4(x+1)=4x+4
x(x+2)=x²+2x
x(x-6)=x²-6x
x(x²-4)=x³-4x
6(2x+9)=12x+54
7(3x-8)=21x-56
3x(x+5)=3x²+15x
5x(x-1)=5x²-5x
2x(2+9x)=4x+18x² ou 18x²+4x
4x(x²+3x)=4x³+12x²
2x²(5-7x)=10x²-14x³=-14x³+10x²
3ab(15a+8b)=45a²b+24ab²
bonus
-5(x²+2)=-5x²-10
-2(5x-6)=-10x+12
-1(-x+3)=x-3
-10(-5-x²)=50+10x²=10x²+50
-9(2x-1)=-18x+9
-x(6x+2)=-6x²-2x
x(-x+1)=-x²+x
-15x(x²-4)=-15x³+60x
-6x(-2x-9)=12x²+54x
-(2x+5)=-2x-5
13x(-x-2x²)=-13x²-26x³=-26x³-13x²
-2.5x(x-1)=-2.5x²+2.5x
-(-2+9x)=2-9x=-9x+2
-1.5x(-4x²+3x)=6x³-4.5x²
-2x²(-5x²-7x)=10x⁴+14x³
Explications étape par étape
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Réponse :
bonjour
3(x+2)=3x+6
7(x-6)=7x-42
1(x+5)=x+5
4(5-x)=20-4x ou -4x+20
4(x+1)=4x+4
x(x+2)=x²+2x
x(x-6)=x²-6x
x(x²-4)=x³-4x
6(2x+9)=12x+54
7(3x-8)=21x-56
3x(x+5)=3x²+15x
5x(x-1)=5x²-5x
2x(2+9x)=4x+18x² ou 18x²+4x
4x(x²+3x)=4x³+12x²
2x²(5-7x)=10x²-14x³=-14x³+10x²
3ab(15a+8b)=45a²b+24ab²
bonus
-5(x²+2)=-5x²-10
-2(5x-6)=-10x+12
-1(-x+3)=x-3
-10(-5-x²)=50+10x²=10x²+50
-9(2x-1)=-18x+9
-x(6x+2)=-6x²-2x
x(-x+1)=-x²+x
-15x(x²-4)=-15x³+60x
-6x(-2x-9)=12x²+54x
-(2x+5)=-2x-5
13x(-x-2x²)=-13x²-26x³=-26x³-13x²
-2.5x(x-1)=-2.5x²+2.5x
-(-2+9x)=2-9x=-9x+2
-1.5x(-4x²+3x)=6x³-4.5x²
-2x²(-5x²-7x)=10x⁴+14x³
Explications étape par étape