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(x-3)(x+4)-2(3x-2)=(x-4)^2



Răspuns :

(x-3)(x+4)-2(3x-2)=(x-4)×2

5x-3+4-2=2x-8

5x+5=2x-8

7x=5+8

7x=13

x=13:7

x=1.8

Succes!