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Drgd
@Drgd
January 2021
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Maths: Pouvez vous m' aider s'il vous plait ?
Je donne 20 points !
L' exercice n° 25 sur la photo.
Merci à ceux qui m'aideront !
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linouchette
A=3(x+2)+(7+4x)(7-6x)
a=3x+6+49-42x+28x-24x^2
a=-24x^2+31x-42x+55
a=-24x^2-11x+55
b=4(x+9)-(7+x)(x+1)
b=4x+36-(7x+7+x^2+x)
b=4x+36-(x^2+8x+7)
b=4x+36-x^2-8x-7
b=-x^2-4x+29
c=-2 (1-3x)-(3x+2)(x-5)
c=-2+6x-(3x^2-15x+2x-10)
c=-2+6x-(3x^2-13x-10)
c=-2+6x-3x^2+13x+10
c=-3x^2+19x+8
d=-3 (a^2+2)-(a-3)(2a+7)
d=-3a^2-6-(2a^2+7a-6a-21)
d=-3a^2-6-(2a^2+a-21)
d=-3a^2-6-2a^2-a+21
d=-5a^2-a+15
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Drgd
Merci
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a=3x+6+49-42x+28x-24x^2
a=-24x^2+31x-42x+55
a=-24x^2-11x+55
b=4(x+9)-(7+x)(x+1)
b=4x+36-(7x+7+x^2+x)
b=4x+36-(x^2+8x+7)
b=4x+36-x^2-8x-7
b=-x^2-4x+29
c=-2 (1-3x)-(3x+2)(x-5)
c=-2+6x-(3x^2-15x+2x-10)
c=-2+6x-(3x^2-13x-10)
c=-2+6x-3x^2+13x+10
c=-3x^2+19x+8
d=-3 (a^2+2)-(a-3)(2a+7)
d=-3a^2-6-(2a^2+7a-6a-21)
d=-3a^2-6-(2a^2+a-21)
d=-3a^2-6-2a^2-a+21
d=-5a^2-a+15