x^2+26x=11

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Solution for x^2+26x=11 equation:


Simplifying
x2 + 26x = 11

Reorder the terms:
26x + x2 = 11

Solving
26x + x2 = 11

Solving for variable 'x'.

Reorder the terms:
-11 + 26x + x2 = 11 + -11

Combine like terms: 11 + -11 = 0
-11 + 26x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '11' to each side of the equation.
-11 + 26x + 11 + x2 = 0 + 11

Reorder the terms:
-11 + 11 + 26x + x2 = 0 + 11

Combine like terms: -11 + 11 = 0
0 + 26x + x2 = 0 + 11
26x + x2 = 0 + 11

Combine like terms: 0 + 11 = 11
26x + x2 = 11

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 = 11 + 169

Reorder the terms:
169 + 26x + x2 = 11 + 169

Combine like terms: 11 + 169 = 180
169 + 26x + x2 = 180

Factor a perfect square on the left side:
(x + 13)(x + 13) = 180

Calculate the square root of the right side: 13.416407865

Break this problem into two subproblems by setting 
(x + 13) equal to 13.416407865 and -13.416407865.

Subproblem 1

x + 13 = 13.416407865 Simplifying x + 13 = 13.416407865 Reorder the terms: 13 + x = 13.416407865 Solving 13 + x = 13.416407865 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 = 13.416407865 + -13 Combine like terms: 13 + -13 = 0 0 + x = 13.416407865 + -13 x = 13.416407865 + -13 Combine like terms: 13.416407865 + -13 = 0.416407865 x = 0.416407865 Simplifying x = 0.416407865

Subproblem 2

x + 13 = -13.416407865 Simplifying x + 13 = -13.416407865 Reorder the terms: 13 + x = -13.416407865 Solving 13 + x = -13.416407865 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 = -13.416407865 + -13 Combine like terms: 13 + -13 = 0 0 + x = -13.416407865 + -13 x = -13.416407865 + -13 Combine like terms: -13.416407865 + -13 = -26.416407865 x = -26.416407865 Simplifying x = -26.416407865

Solution

The solution to the problem is based on the solutions from the subproblems. x = {0.416407865, -26.416407865}

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