Question

решите уравнение 5х (2)-2х-3=0

Answer 1

5x^2 - 2x - 3 = 0 
D = 4 + 4*5*3 = 4 + 60  = 64 = 8^2
x1 = ( 2 + 8)/10 = 10/10 = 1;
x2 = ( 2 - 8)/10 = - 6/10 = - 3/5 = - 0,6