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Calculati:
a) (x la patrat-5x+6)(x la patrat_5x+4)


Răspuns :


x²-5x+6=x²-2x-3x+6 =x(x-2) -3(x-2)=(x-2)(x-3)
x²-5x+4=x²-x-4x+4-x(x-1)-4(x-1)=(x-1)(x-4)
produsul acestora va fi ...= (x-1)(x-2)(x-3)(x-4)