x^2-x-516=0

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Solution for x^2-x-516=0 equation:


Simplifying
x2 + -1x + -516 = 0

Reorder the terms:
-516 + -1x + x2 = 0

Solving
-516 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '516' to each side of the equation.
-516 + -1x + 516 + x2 = 0 + 516

Reorder the terms:
-516 + 516 + -1x + x2 = 0 + 516

Combine like terms: -516 + 516 = 0
0 + -1x + x2 = 0 + 516
-1x + x2 = 0 + 516

Combine like terms: 0 + 516 = 516
-1x + x2 = 516

The x term is -1x.  Take half its coefficient (-0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
-1x + 0.25 + x2 = 516 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 516 + 0.25

Combine like terms: 516 + 0.25 = 516.25
0.25 + -1x + x2 = 516.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 516.25

Calculate the square root of the right side: 22.721135535

Break this problem into two subproblems by setting 
(x + -0.5) equal to 22.721135535 and -22.721135535.

Subproblem 1

x + -0.5 = 22.721135535 Simplifying x + -0.5 = 22.721135535 Reorder the terms: -0.5 + x = 22.721135535 Solving -0.5 + x = 22.721135535 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = 22.721135535 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 22.721135535 + 0.5 x = 22.721135535 + 0.5 Combine like terms: 22.721135535 + 0.5 = 23.221135535 x = 23.221135535 Simplifying x = 23.221135535

Subproblem 2

x + -0.5 = -22.721135535 Simplifying x + -0.5 = -22.721135535 Reorder the terms: -0.5 + x = -22.721135535 Solving -0.5 + x = -22.721135535 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '0.5' to each side of the equation. -0.5 + 0.5 + x = -22.721135535 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -22.721135535 + 0.5 x = -22.721135535 + 0.5 Combine like terms: -22.721135535 + 0.5 = -22.221135535 x = -22.221135535 Simplifying x = -22.221135535

Solution

The solution to the problem is based on the solutions from the subproblems. x = {23.221135535, -22.221135535}

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