Bonsoir
A = 3x(4x - 2)
A = 12x² − 6x
B = (4x-2)(2x+1)
B = 8x²+4x -4x-2 ( pas très sûr)
C = 3x+9-12
C = 3(x+3-4)
D = (3x+1)(x-2)-(5x+7)(x-2)
D = (x-2)(3x+1-5x+7)
j'espère t'avoir aidé !
Bonjour,
A=3x(4x-2)
=12x^2-6x
B=(4x-2)(2x+1)
=8x^2+4x-4x-2
=8x^2-2
C=(3x+9-12)^2
=(3x-3)^2
=(3(-1+x))^2
=9(-1+x)^2
D=(3x+1)(x-2)-(5x+7)(x-2)
=(x-2)(3x+1-5x+7)
=(x-2)(-2x-6)
=(x-2)(-2(x+3))
= -2(x-2)(x+3)
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Bonsoir
A = 3x(4x - 2)
A = 12x² − 6x
B = (4x-2)(2x+1)
B = 8x²+4x -4x-2 ( pas très sûr)
C = 3x+9-12
C = 3(x+3-4)
D = (3x+1)(x-2)-(5x+7)(x-2)
D = (x-2)(3x+1-5x+7)
j'espère t'avoir aidé !
Verified answer
Bonjour,
A=3x(4x-2)
=12x^2-6x
B=(4x-2)(2x+1)
=8x^2+4x-4x-2
=8x^2-2
C=(3x+9-12)^2
=(3x-3)^2
=(3(-1+x))^2
=9(-1+x)^2
D=(3x+1)(x-2)-(5x+7)(x-2)
=(x-2)(3x+1-5x+7)
=(x-2)(-2x-6)
=(x-2)(-2(x+3))
= -2(x-2)(x+3)