Réponse :
factoriser
A = (x - 3)(x+5) - 3(x + 5)
= (x +5)(x - 3 - 3)
= (x+5)(x - 6)
B = (2 x + 3)(x - 4) + (3 x - 5)(x - 4)
= (x - 4)(2 x + 3 + 3 x - 5)
= (x - 4)(5 x - 2)
C = (3 x - 1)(x - 2) - (2 x + 5)(3 x - 1)
= (3 x - 1)(x - 2 - 2 x - 5)
= (3 x - 1)(- x - 7)
Explications étape par étape
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Réponse :
factoriser
A = (x - 3)(x+5) - 3(x + 5)
= (x +5)(x - 3 - 3)
= (x+5)(x - 6)
B = (2 x + 3)(x - 4) + (3 x - 5)(x - 4)
= (x - 4)(2 x + 3 + 3 x - 5)
= (x - 4)(5 x - 2)
C = (3 x - 1)(x - 2) - (2 x + 5)(3 x - 1)
= (3 x - 1)(x - 2 - 2 x - 5)
= (3 x - 1)(- x - 7)
Explications étape par étape