Răspunsuri

2014-09-24T17:31:29+03:00
2x-x²-6+3x-x+5=-2x²+12x-5x+5
2x-x²+3x-x+2x²-12x+5x=5+6-5
-3x+x²=6
x²-3x-6=0
mai departe afli Δ x1 si x2