Question

Розв'язати рівняння

Answer 1

x^2 - 11x + 30 = 0
a = 1, b = -11, c = 30
D = b^2 - 4ac = (-11)^2 - 4*1*30 = 121 - 120 = 1
x1 = (-b+sqrt(D))/2a = (11+1)/2 = 12/2 = 6
x2 = (-b-sqrt(D))/2a = (11-1)/2 = 10/2 = 5