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(t+8)^2-t-8=?
(x+1)^2+3x+3


Răspuns :

(t+8)²- (t+8)= (t+8) (t+8-1)= (t+8)(t+7)
(x+1)²+3(x+1)= (x+1) (x+1+3)= (x+1)(x+4)