Réponse :
bonjour
Explications étape par étape :
12+3x
=3*4 +3*x ("*"=multiplié par)
= 3(4+x)
14x+7
=2x*7 -7x1
=7(2x-1)
2x-8x²
=2*x - 2*4x*x
=2x (1-4x)
7(x-5) - (x-5)(9-2x)
=7(x-5) - (x-5)(9-2x)
=(x-5) (7-9+2x)
=(x-5) (-2+2x)
(2x-3)²+(2x-3)(x+1)
= (2x-3)²+(2x-3)(x+1)
=(2x-3) (2x-3+x+1)
=(2x-3)(3x-2)
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Réponse :
bonjour
Explications étape par étape :
12+3x
=3*4 +3*x ("*"=multiplié par)
= 3(4+x)
14x+7
=2x*7 -7x1
=7(2x-1)
2x-8x²
=2*x - 2*4x*x
=2x (1-4x)
7(x-5) - (x-5)(9-2x)
=7(x-5) - (x-5)(9-2x)
=(x-5) (7-9+2x)
=(x-5) (-2+2x)
(2x-3)²+(2x-3)(x+1)
= (2x-3)²+(2x-3)(x+1)
=(2x-3) (2x-3+x+1)
=(2x-3)(3x-2)