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Lola93170
@Lola93170
January 2021
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bonsoir , besoin d'aide développer et réduction
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AhYan
Verified answer
Bonsoir,
1.a) (x-2)² = x²-4x+4
1.b) (2x-1)(-3x+1) = -6x²+2x+3x-1 = -6x²+5x-1
1.c) 2(x+3)² = 2(x²+6x+9) = 2x²+12x+18
2.a) x²-5x = x(x-5) => x est le facteur commun
2.b) (x-3)(x+1) + 2(x+1) = (x+1)(x-3+2) = (x+1)(x-1) => (x+1) est le facteur commun
2.c) x²-6x+9 = (x-3)² => identité remarquable
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Lola93170
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Bonjour pouvez vous me corriger mon essais en vous remerciant d'avance
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Bonsoir quelqu'un pourrait m'aider , merci d'avance
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Lola93170
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Bonjour , il faut simplifier le calcul suivant le plus possible : -5,6 x 0,25 x (-8) sur -2 x 2,8
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Verified answer
Bonsoir,1.a) (x-2)² = x²-4x+4
1.b) (2x-1)(-3x+1) = -6x²+2x+3x-1 = -6x²+5x-1
1.c) 2(x+3)² = 2(x²+6x+9) = 2x²+12x+18
2.a) x²-5x = x(x-5) => x est le facteur commun
2.b) (x-3)(x+1) + 2(x+1) = (x+1)(x-3+2) = (x+1)(x-1) => (x+1) est le facteur commun
2.c) x²-6x+9 = (x-3)² => identité remarquable