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Cum se descompune termenul 5x la puterea2 +12x+7

Răspuns :

5x²+5x+7x+7=5x(x+1)+7(x+1)=(x+1)(5x+7)
5x²+12x+7 = (5x² +5x) + (7x + 7) =5x(x+1) + 7(x+1) = (x+1)(5x+7) ;