Решите уравнение 2х(2)-х-6=0
2x^2 - x - 6 = 0 D= 1 + 4*2*6 = 1 + 48 = 49 x1 = (1 + 7)/4 = 8/4 = 2; x2 = ( 1 - 7)/4 = -6/4 = - 3/2 = - 1,5 ;