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rezolvati in R ecuatiile
(x-3)(x+4)-2(3x-2)=(x-4) la a 2
(x+5)(x+2)-3(4x-3)=(x-5)la a 2
x(x+2)-13=(x-3)(x+3)
4x(x-1)=(2x+5)(2x-5)+1
Ajutatima va rog