x^2+26x=88

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Solution for x^2+26x=88 equation:


Simplifying
x2 + 26x = 88

Reorder the terms:
26x + x2 = 88

Solving
26x + x2 = 88

Solving for variable 'x'.

Reorder the terms:
-88 + 26x + x2 = 88 + -88

Combine like terms: 88 + -88 = 0
-88 + 26x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '88' to each side of the equation.
-88 + 26x + 88 + x2 = 0 + 88

Reorder the terms:
-88 + 88 + 26x + x2 = 0 + 88

Combine like terms: -88 + 88 = 0
0 + 26x + x2 = 0 + 88
26x + x2 = 0 + 88

Combine like terms: 0 + 88 = 88
26x + x2 = 88

The x term is 26x.  Take half its coefficient (13).
Square it (169) and add it to both sides.

Add '169' to each side of the equation.
26x + 169 + x2 = 88 + 169

Reorder the terms:
169 + 26x + x2 = 88 + 169

Combine like terms: 88 + 169 = 257
169 + 26x + x2 = 257

Factor a perfect square on the left side:
(x + 13)(x + 13) = 257

Calculate the square root of the right side: 16.031219542

Break this problem into two subproblems by setting 
(x + 13) equal to 16.031219542 and -16.031219542.

Subproblem 1

x + 13 = 16.031219542 Simplifying x + 13 = 16.031219542 Reorder the terms: 13 + x = 16.031219542 Solving 13 + x = 16.031219542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = 16.031219542 + -13 Combine like terms: 13 + -13 = 0 0 + x = 16.031219542 + -13 x = 16.031219542 + -13 Combine like terms: 16.031219542 + -13 = 3.031219542 x = 3.031219542 Simplifying x = 3.031219542

Subproblem 2

x + 13 = -16.031219542 Simplifying x + 13 = -16.031219542 Reorder the terms: 13 + x = -16.031219542 Solving 13 + x = -16.031219542 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-13' to each side of the equation. 13 + -13 + x = -16.031219542 + -13 Combine like terms: 13 + -13 = 0 0 + x = -16.031219542 + -13 x = -16.031219542 + -13 Combine like terms: -16.031219542 + -13 = -29.031219542 x = -29.031219542 Simplifying x = -29.031219542

Solution

The solution to the problem is based on the solutions from the subproblems. x = {3.031219542, -29.031219542}

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