Factoriser A = ( 3x + 2)² - (7x - 1)² (3x + 2)
Mathématiques
valentin8936
Question
Factoriser A = ( 3x + 2)² - (7x - 1)² (3x + 2)
1 Réponse
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1. Réponse droopette
A=(3x+2)²-(7x-1)²(3x+2)
=(3x+2)(3x+2)-(7x-1)²(3x+2)
=(3x+2)[3x+2-(7x-1)²]
=(3x+2)[3x-2-(49x²-14x+1)]
=(3x+2)(3x-2-49x²+14x-1)
=(3x+2)(-49x²+17x-3)