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Rezolvati urmatoare ecuatie:(x+2)(x+3)-5(x+1)=(x-1)^2+6

Răspuns :

x^2 + 3x+ 2x+ 6 - 5x-5 = x^2 - 2x + 1 +6
x^2+ 1 = x^2 -2x+ 7
2x=6 deci x=3