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magalivinet
@magalivinet
January 2021
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bonjour pouvez vous m'aider svp j'ai du mal avec les signes je suis en 4ème merci d'avance
développer:
(x-4)((x+1)
(x²+1)(x+2)
(5-x)(-3-x)
(2a+4)(3a-5)
(x²-3)(-2x+4)
(3x-7)(4x²-1)
(1+x)(-x+1)
(3x²-5)(x+2)
(-3+x)(6-2x²)
merci
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Aftershock
(x-4)(x+1) = x²+x-4x-4
⇔ x²-3x-4
(x²+1)(x+2) = x³+2x²+x+2
(5-x)(-3-x) = -15-5x+3x+x²
⇔ x²-2x-15
(2a+4)(3a-5) = 6a²-10a+12a-20
⇔ 6a²+2a-20
(x²-3)(-2x+4) = -2x³+4x²+6x-12
(3x-7)(4x²-1) = 12x³-3x-28x²+7
⇔ 12x³-28x²-3x+7
(1+x)(-x+1) = -x+1-x²+x
⇔ -x²+1
(3x²-5)(x+2) = 3x³+6x²-5x-10
(-3+x)(6-2x²) = -18+6x²+6x-2x
³
⇔ -2x³+6x²+6-18
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⇔ x²-3x-4
(x²+1)(x+2) = x³+2x²+x+2
(5-x)(-3-x) = -15-5x+3x+x²
⇔ x²-2x-15
(2a+4)(3a-5) = 6a²-10a+12a-20
⇔ 6a²+2a-20
(x²-3)(-2x+4) = -2x³+4x²+6x-12
(3x-7)(4x²-1) = 12x³-3x-28x²+7
⇔ 12x³-28x²-3x+7
(1+x)(-x+1) = -x+1-x²+x
⇔ -x²+1
(3x²-5)(x+2) = 3x³+6x²-5x-10
(-3+x)(6-2x²) = -18+6x²+6x-2x³
⇔ -2x³+6x²+6-18