Question
Bonsoir j'aurai besoin d'aide pour factoriser :
A=4(x-4)2 - 16 (2x+7)2
B=(2x-5)2 - 4x2 + 25
C=(4x-12)(3x-5)-(5x-6)(x-3)
D=4(2x-6)+5(4x-12)-x+3
merci
A=4(x-4)2 - 16 (2x+7)2
B=(2x-5)2 - 4x2 + 25
C=(4x-12)(3x-5)-(5x-6)(x-3)
D=4(2x-6)+5(4x-12)-x+3
merci
Asked by: USER9775
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179 Answers
Answer (179)
xBonjour,
A=4(x-4)2 - 16 (2x+7)2
A = 4 (x² - 8x + 16) - 16 (4x² + 28x + 49)
A = 4x² - 32x + 64 - 64x² - 448x - 784
A = - 60x² - 480x - 720
A = -60 (2 + x) (6 + x)
B=(2x-5)2 - 4x2 + 25
B = 4x² - 20x + 25 - 4x² + 25
B = - 20x + 50
B = - 10 (2x - 5)
C=(4x-12)(3x-5)-(5x-6)(x-3)
C = 12x² - 20x - 36x + 60 - (5x² - 15x - 6x + 18)
C = 12x² - 20x - 36x + 60 - 5x² + 15x + 6x - 18
C = 12x² - 5x² - 20x - 36x + 15x + 6x + 60 - 18
C = 7x² - 35x + 42
C = 7 (x - 3) (x - 2)
D=4(2x-6)+5(4x-12)-x+3
D = 8x - 24 + 20x - 60 - x + 3
D = 27x - 81
D = 27 (x - 3)
A=4(x-4)2 - 16 (2x+7)2
A = 4 (x² - 8x + 16) - 16 (4x² + 28x + 49)
A = 4x² - 32x + 64 - 64x² - 448x - 784
A = - 60x² - 480x - 720
A = -60 (2 + x) (6 + x)
B=(2x-5)2 - 4x2 + 25
B = 4x² - 20x + 25 - 4x² + 25
B = - 20x + 50
B = - 10 (2x - 5)
C=(4x-12)(3x-5)-(5x-6)(x-3)
C = 12x² - 20x - 36x + 60 - (5x² - 15x - 6x + 18)
C = 12x² - 20x - 36x + 60 - 5x² + 15x + 6x - 18
C = 12x² - 5x² - 20x - 36x + 15x + 6x + 60 - 18
C = 7x² - 35x + 42
C = 7 (x - 3) (x - 2)
D=4(2x-6)+5(4x-12)-x+3
D = 8x - 24 + 20x - 60 - x + 3
D = 27x - 81
D = 27 (x - 3)