Найду корень уравнения: -x^2+5=0
2 - x + 5 = 0
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(0)^2 - 4 * (-1) * (5) = 20
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
___ x1 = -\/ 5
___ x2 = \/ 5
x1 = 2.23606797749979
x2 = -2.23606797749979