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julieleagym
@julieleagym
January 2021
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Bonjour , pouvez vous m'aidez pour ses deux exercices?, dans le 56 il faut résoudre les équations et dans le 57 factoriser les expressions puis résoudre les équations merci d'avance pour vos réponses
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trudelmichel
Verified answer
Bonjour
(x+2)²=0
x+2=0
x=-2
(-9y+1)²=0
-9y+1=0
1=9y
y=1/9
(-4-x)²=0
-4-x=0x=-4
(5a+6)²=0
5a+6=0
5a=-6
a=-6/5
a=1.2
(3b-3)²=0
3b-3=0
3b=3
b=1
(-6y-3)²=0
-6y-3=0
6y=-3
y=-3/6
y=-0.5
x²+5x=0
x(x+5)=0
x=0 x+5=0 x=-5
2y+y²=0
y(2+y)=0
y=0 2+y=0 y=-2
-3x=x²
x²+3x=0
x(x+3)=0
x=0 x+3=0 x=-3
-2a²+5a=0
a(-2a+5)=0
a=0 -2a+5=0 5=2a a=5/2 a=2.5
5b²=-2b
5b²+2b=0
b(5b+2)=0
b=0 5b+2=0 5b=-2 b=-2/5 b=-0.4
-9y=8y²
8y²+9y=0
y(8y+9)=0
y=0 8y+9=0 8y=-9 y=-9/8
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Thanks 1
julieleagym
Merci énormément !
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Verified answer
Bonjour(x+2)²=0
x+2=0
x=-2
(-9y+1)²=0
-9y+1=0
1=9y
y=1/9
(-4-x)²=0
-4-x=0x=-4
(5a+6)²=0
5a+6=0
5a=-6
a=-6/5
a=1.2
(3b-3)²=0
3b-3=0
3b=3
b=1
(-6y-3)²=0
-6y-3=0
6y=-3
y=-3/6
y=-0.5
x²+5x=0
x(x+5)=0
x=0 x+5=0 x=-5
2y+y²=0
y(2+y)=0
y=0 2+y=0 y=-2
-3x=x²
x²+3x=0
x(x+3)=0
x=0 x+3=0 x=-3
-2a²+5a=0
a(-2a+5)=0
a=0 -2a+5=0 5=2a a=5/2 a=2.5
5b²=-2b
5b²+2b=0
b(5b+2)=0
b=0 5b+2=0 5b=-2 b=-2/5 b=-0.4
-9y=8y²
8y²+9y=0
y(8y+9)=0
y=0 8y+9=0 8y=-9 y=-9/8