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lala12p03
@lala12p03
January 2021
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Bonjour, vous pouvez m'aider s'il vous plaît cest des maths.
Merci à ceux qui m'aideront
Faut faire le 2 C D
le 3 4 et 5 ..
le reste aussi mais je vais pas abuser
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PetiteKyojo
Bonjour !
Exercice 2 :
C=2x(1-x)
2x-2x×x
=2x-2x²
D=-2a(-5a+4)
-2a(-5a)-2ax4
=10a²-8a
Exercice 3 :
A=3(x-1)+2(2-x)
3x-3+4-2x
=x+1
B=2-7(2-x)
2-14+7x
=-12+7x
C=-(2-a)-(-5a+4)
-2+a+5a-4
=-6+6a
Exercice 4 :
A=(x-1)(2-y)
2x-xy-2+1y
=2x-xy-2+y
B=(x-2)(1+x)
x+x²-2-2x
=x²-x-2
C=x-7x2-x
=-14
Exercice 5 :
A=(x-3)(1-y)
x-xy-3-3x(-y)
=x-xy-3+3y
B=(3-x)(4+x)
12+3x-4x-x²
12-x-x²
=-x²-x+12
C=(2x+4)(x+1)
2x²+2x+4x+4
=2x²+6x+4
Exercice 6 : (je sais que tu n'avais pas demander de le faire mais j'avais envie lol)
A=(2x-5)(-7-4x)
-14x-8x²+35+20x
6x-8x²+35
=-8x²+6x+35
B=2x-5(-7-4x)
2x+35+20x
=22x+35
C=(2x-5)-(7-4x)
2x-5-7+4x
=6x-12
0 votes
Thanks 1
lala12p03
merci beaucoup c'est déjà un petit plus hihi
PetiteKyojo
Hahah oui , de rien. ^^
lala12p03
:)
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Exercice 2 :
C=2x(1-x)
2x-2x×x
=2x-2x²
D=-2a(-5a+4)
-2a(-5a)-2ax4
=10a²-8a
Exercice 3 :
A=3(x-1)+2(2-x)
3x-3+4-2x
=x+1
B=2-7(2-x)
2-14+7x
=-12+7x
C=-(2-a)-(-5a+4)
-2+a+5a-4
=-6+6a
Exercice 4 :
A=(x-1)(2-y)
2x-xy-2+1y
=2x-xy-2+y
B=(x-2)(1+x)
x+x²-2-2x
=x²-x-2
C=x-7x2-x
=-14
Exercice 5 :
A=(x-3)(1-y)
x-xy-3-3x(-y)
=x-xy-3+3y
B=(3-x)(4+x)
12+3x-4x-x²
12-x-x²
=-x²-x+12
C=(2x+4)(x+1)
2x²+2x+4x+4
=2x²+6x+4
Exercice 6 : (je sais que tu n'avais pas demander de le faire mais j'avais envie lol)
A=(2x-5)(-7-4x)
-14x-8x²+35+20x
6x-8x²+35
=-8x²+6x+35
B=2x-5(-7-4x)
2x+35+20x
=22x+35
C=(2x-5)-(7-4x)
2x-5-7+4x
=6x-12