x^2+26x=68

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Solution for x^2+26x=68 equation:


Simplifying
x2 + 26x = 68

Reorder the terms:
26x + x2 = 68

Solving
26x + x2 = 68

Solving for variable 'x'.

Reorder the terms:
-68 + 26x + x2 = 68 + -68

Combine like terms: 68 + -68 = 0
-68 + 26x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '68' to each side of the equation.
-68 + 26x + 68 + x2 = 0 + 68

Reorder the terms:
-68 + 68 + 26x + x2 = 0 + 68

Combine like terms: -68 + 68 = 0
0 + 26x + x2 = 0 + 68
26x + x2 = 0 + 68

Combine like terms: 0 + 68 = 68
26x + x2 = 68

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 = 68 + 169

Reorder the terms:
169 + 26x + x2 = 68 + 169

Combine like terms: 68 + 169 = 237
169 + 26x + x2 = 237

Factor a perfect square on the left side:
(x + 13)(x + 13) = 237

Calculate the square root of the right side: 15.394804318

Break this problem into two subproblems by setting 
(x + 13) equal to 15.394804318 and -15.394804318.

Subproblem 1

x + 13 = 15.394804318 Simplifying x + 13 = 15.394804318 Reorder the terms: 13 + x = 15.394804318 Solving 13 + x = 15.394804318 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 = 15.394804318 + -13 Combine like terms: 13 + -13 = 0 0 + x = 15.394804318 + -13 x = 15.394804318 + -13 Combine like terms: 15.394804318 + -13 = 2.394804318 x = 2.394804318 Simplifying x = 2.394804318

Subproblem 2

x + 13 = -15.394804318 Simplifying x + 13 = -15.394804318 Reorder the terms: 13 + x = -15.394804318 Solving 13 + x = -15.394804318 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 = -15.394804318 + -13 Combine like terms: 13 + -13 = 0 0 + x = -15.394804318 + -13 x = -15.394804318 + -13 Combine like terms: -15.394804318 + -13 = -28.394804318 x = -28.394804318 Simplifying x = -28.394804318

Solution

The solution to the problem is based on the solutions from the subproblems. x = {2.394804318, -28.394804318}

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