Question

Решите .заранее спасибо

Answer 1

№2.
а) 5х^2 - 2x - 3 = 0.
D = (-2)^2 - (-4)*5*3 = 4 + 60 = 64 = 8^2
x = (2+8)/10; x = 1.
x = (2-8)/10; x = -(2/3)