1. Développer et réduire A = 2x(5−3x)−(2x −5)(x + 4) B=(x+3)2 C = (5 − 3x)2 D = (7x − 2)(7x + 2) 2. Factoriser A = 2x(x+7)−3(x+7) B=(5x−3)2 +(5x−3)(x+4) C=16x
Mathématiques
mathildaaa2
Question
1. Développer et réduire
A = 2x(5−3x)−(2x −5)(x + 4) B=(x+3)2
C = (5 − 3x)2
D = (7x − 2)(7x + 2)
2. Factoriser
A = 2x(x+7)−3(x+7)
B=(5x−3)2 +(5x−3)(x+4) C=16x2 +40x+25
D = 81− 36x2
E=4x2 −36x+81
F=16x2 −(x+2)2
A = 2x(5−3x)−(2x −5)(x + 4) B=(x+3)2
C = (5 − 3x)2
D = (7x − 2)(7x + 2)
2. Factoriser
A = 2x(x+7)−3(x+7)
B=(5x−3)2 +(5x−3)(x+4) C=16x2 +40x+25
D = 81− 36x2
E=4x2 −36x+81
F=16x2 −(x+2)2
1 Réponse
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1. Réponse blondinetteoceane88
Exercice 1
A = 2x(5−3x)−(2x −5)(x + 4)
A=10-6x-(2x²+8x-5x-20)
A=10-6x-2x²-8x+5x+20
A=-2x²+3x+30
B=(x+3)2
B=2X+6
C=(5-3x)2
C=10-6x
D=(7x-2)(7x+2)
D=54x²+14x-14x+4
D=54x²+4