SVP aider moi pour les maths sur la factorisation ! A=(5x-1)-2(5x-1)(x+3) B=(4x+1)(7x-2)+(2x-7)(4x+1) C=(4x+1)^2-9 D=16x^2+y^2-8xy
Mathématiques
ysarah2000
Question
SVP aider moi pour les maths sur la factorisation !
A=(5x-1)-2(5x-1)(x+3)
B=(4x+1)(7x-2)+(2x-7)(4x+1)
C=(4x+1)^2-9
D=16x^2+y^2-8xy
A=(5x-1)-2(5x-1)(x+3)
B=(4x+1)(7x-2)+(2x-7)(4x+1)
C=(4x+1)^2-9
D=16x^2+y^2-8xy
1 Réponse
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1. Réponse Anonyme
A=(5x-1)-2(5x-1)(x+3)
=(5x-1)(1-2x-6)
=(5x-1)(-2x-5)
B=(4x+1)(7x-2)+(2x-7)(4x+1)
=(4x+1)(7x-2+2x-7)
=(4x+1)(9x-9)
=9(4x+1)(x-1)
C=(4x+1)^2-9
=(4x+1-3)(4x+1+3)
=8(2x-1)(x+1)
D=16x^2+y^2-8xy
=(4x-y)²