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Sila51
@Sila51
April 2019
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Développer,puis réduire chaque expression
a) 5x(3x-1)-10x au carré(petit -2 le au carre )
b)6x(-2+3)-4x
c)(x+3)(2x-1)
d)(5-3x)(4x-7)
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Looshy
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Looshy
ah bah c'est que t'as pas bien appris ton cours ^^
Looshy
bah j'ai développé, comme demandé dans la consigne
Looshy
merci peut-être au lieu de m'engueuler ? xd
Looshy
nan mais y a pas de raisonnement, y a juste à appliquer les formules, que tu connais pas apperemment
jujitsuzakaria
A=5x(3x-1)-(10x)²
=15x²-5x-100x²
=-85x²-5x
b=6x(-2+3)-4x
=-12x+18x-4x
=2x
c=(x+3)(2x-1)
=2x²-x+6x-3
=2x²+5x-3
d=(5-3x)(4x-7)
=20x-35-12x²+21x
=41x-12x²-35
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=15x²-5x-100x²
=-85x²-5x
b=6x(-2+3)-4x
=-12x+18x-4x
=2x
c=(x+3)(2x-1)
=2x²-x+6x-3
=2x²+5x-3
d=(5-3x)(4x-7)
=20x-35-12x²+21x
=41x-12x²-35