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Ananas62
@Ananas62
April 2019
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On me demande de développer et de réduire f(x):
f(x)=(x^2-9)-2(x-3)(x+2)
J'ai fais:
f(x)=(x^2-9)-2(x-3)(x+2)
=(x+3)^2-2(x^2+2x-3x-6)
=(x^2-2*x*3-3^2)-(2x^2+4x-6x-12)
=x^2+2x^2+6x+9+4x-6x-12
=3x^2+6x-6x+4x+9-12
=3x^2-4x-3
Vous pouvez me corriger?=d
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lamine12
f(x)=(x^2-9)-2(x-3)(x+2)
=x^2-9-2(x^2+2x-3x-6)
=x^-9-2(x^2-x-6)
=x^2-9-2x^2+4x+12
=x^2-2x^2+4x-9+12
=-x^2+4x+3
0 votes
Thanks 1
turquish75
F(x)=(x^2-9)-2(x-3)(x+2)
=x^2-9-2(x^2+2x-3x-6)
=x^-9-2(x^2-x-6)
=x^2-9-2x^2+4x+12
=x^2-2x^2+4x-9+12
=-x^2+4x+3
0 votes
Thanks 1
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Lista de comentários
=x^2-9-2(x^2+2x-3x-6)
=x^-9-2(x^2-x-6)
=x^2-9-2x^2+4x+12
=x^2-2x^2+4x-9+12
=-x^2+4x+3
=x^2-9-2(x^2+2x-3x-6)
=x^-9-2(x^2-x-6)
=x^2-9-2x^2+4x+12
=x^2-2x^2+4x-9+12
=-x^2+4x+3