Question

решите уравнение
2х(2)-х-6=0

Answer 1

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 ;