Найду корень уравнения: x^2-5*x-14 = 0
2 x - 5*x - 14 = 0
a*x^2 + b*x + c = 0
D = b^2 - 4 * a * c =
(-5)^2 - 4 * (1) * (-14) = 81
x1 = (-b + sqrt(D)) / (2*a)
x2 = (-b - sqrt(D)) / (2*a)
x1 = -2
x2 = 7
x1 = -2.0
x2 = 7.0