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x^2+6x+5 equation

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Numerical solution:

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The solution

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x  + 6*x + 5 = 0
$$\left(x^{2} + 6 x\right) + 5 = 0$$
Detail solution
This equation is of the form
a*x^2 + b*x + c = 0

A quadratic equation can be solved
using the discriminant.
The roots of the quadratic equation:
$$x_{1} = \frac{\sqrt{D} - b}{2 a}$$
$$x_{2} = \frac{- \sqrt{D} - b}{2 a}$$
where D = b^2 - 4*a*c - it is the discriminant.
Because
$$a = 1$$
$$b = 6$$
$$c = 5$$
, then
D = b^2 - 4 * a * c = 

(6)^2 - 4 * (1) * (5) = 16

Because D > 0, then the equation has two roots.
x1 = (-b + sqrt(D)) / (2*a)

x2 = (-b - sqrt(D)) / (2*a)

or
$$x_{1} = -1$$
$$x_{2} = -5$$
Vieta's Theorem
it is reduced quadratic equation
$$p x + q + x^{2} = 0$$
where
$$p = \frac{b}{a}$$
$$p = 6$$
$$q = \frac{c}{a}$$
$$q = 5$$
Vieta Formulas
$$x_{1} + x_{2} = - p$$
$$x_{1} x_{2} = q$$
$$x_{1} + x_{2} = -6$$
$$x_{1} x_{2} = 5$$
The graph
Rapid solution [src]
x1 = -5
$$x_{1} = -5$$
x2 = -1
$$x_{2} = -1$$
x2 = -1
Sum and product of roots [src]
sum
-5 - 1
$$-5 - 1$$
=
-6
$$-6$$
product
-5*(-1)
$$- -5$$
=
5
$$5$$
5
Numerical answer [src]
x1 = -5.0
x2 = -1.0
x2 = -1.0