x^2+16x=-59

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Solution for x^2+16x=-59 equation:


Simplifying
x2 + 16x = -59

Reorder the terms:
16x + x2 = -59

Solving
16x + x2 = -59

Solving for variable 'x'.

Reorder the terms:
59 + 16x + x2 = -59 + 59

Combine like terms: -59 + 59 = 0
59 + 16x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-59' to each side of the equation.
59 + 16x + -59 + x2 = 0 + -59

Reorder the terms:
59 + -59 + 16x + x2 = 0 + -59

Combine like terms: 59 + -59 = 0
0 + 16x + x2 = 0 + -59
16x + x2 = 0 + -59

Combine like terms: 0 + -59 = -59
16x + x2 = -59

The x term is 16x.  Take half its coefficient (8).
Square it (64) and add it to both sides.

Add '64' to each side of the equation.
16x + 64 + x2 = -59 + 64

Reorder the terms:
64 + 16x + x2 = -59 + 64

Combine like terms: -59 + 64 = 5
64 + 16x + x2 = 5

Factor a perfect square on the left side:
(x + 8)(x + 8) = 5

Calculate the square root of the right side: 2.236067978

Break this problem into two subproblems by setting 
(x + 8) equal to 2.236067978 and -2.236067978.

Subproblem 1

x + 8 = 2.236067978 Simplifying x + 8 = 2.236067978 Reorder the terms: 8 + x = 2.236067978 Solving 8 + x = 2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = 2.236067978 + -8 Combine like terms: 8 + -8 = 0 0 + x = 2.236067978 + -8 x = 2.236067978 + -8 Combine like terms: 2.236067978 + -8 = -5.763932022 x = -5.763932022 Simplifying x = -5.763932022

Subproblem 2

x + 8 = -2.236067978 Simplifying x + 8 = -2.236067978 Reorder the terms: 8 + x = -2.236067978 Solving 8 + x = -2.236067978 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-8' to each side of the equation. 8 + -8 + x = -2.236067978 + -8 Combine like terms: 8 + -8 = 0 0 + x = -2.236067978 + -8 x = -2.236067978 + -8 Combine like terms: -2.236067978 + -8 = -10.236067978 x = -10.236067978 Simplifying x = -10.236067978

Solution

The solution to the problem is based on the solutions from the subproblems. x = {-5.763932022, -10.236067978}

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