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Va rog ajutati-ma !Cum rezolv:
x la puterea 2-8x-20=?


Răspuns :

X^2-8x-20=
x^2+2x-10x-20
x•(x+2)-10(x+2)=
(x-10)•(x+2)
X²+2x-10x-20=x(x+2)-10(x+2)=(x+2)(x-10)