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Athou91
@Athou91
April 2019
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Développer puis réduire les expressions suivante puis réduire :
a) A = 9-(4x-1)(2x+3)
b) B = x2 + (1-2x)(5x+3)
c) C = (-3x+2)(7x+2)-(8x-1)(x-8)
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Développer et réduire :
A= 9 - (4x - 1)(2x + 3)
A= 9 - (8x² + 12x - 2x - 3)
A= 9 - 8x² - 12x + 2x + 3
A= - 8x² - 10x + 12
B= x² + (1 - 2x)(5x + 3)
B= x² + 5x + 3 - 10x² - 6x
B= - 9x² - x + 3
C= (- 3x + 2)(7x + 2) - (8x - 1)(x - 8)
C= - 21x² - 6x + 14x + 4 - (8x² - 64x - x + 8)
C= - 21x² + 8x + 4 - 8x² + 64x + x - 8
C= - 29x² + 73x - 4
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Factoriser les expressions suivante : a) E = (5x+2)(4x-3)+(5x+2)(6x+4) b) F = (7x-1)(4x+2)+5(4x+2) Merci d'avance
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Verified answer
Développer et réduire :A= 9 - (4x - 1)(2x + 3)
A= 9 - (8x² + 12x - 2x - 3)
A= 9 - 8x² - 12x + 2x + 3
A= - 8x² - 10x + 12
B= x² + (1 - 2x)(5x + 3)
B= x² + 5x + 3 - 10x² - 6x
B= - 9x² - x + 3
C= (- 3x + 2)(7x + 2) - (8x - 1)(x - 8)
C= - 21x² - 6x + 14x + 4 - (8x² - 64x - x + 8)
C= - 21x² + 8x + 4 - 8x² + 64x + x - 8
C= - 29x² + 73x - 4