3х во 2 степени +5х-2=0 решение
3X^2 + 5X - 2 = 0 D = 25 - 4*3*(-2) = 25 + 24 = 49 ( V D = 7) X1 = ( - 5 + 7) \ 6 = 2\6 = 1\3 X2 = - 12 \ 6 = - 2