0=x^2-256-x-14

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Solution for 0=x^2-256-x-14 equation:


Simplifying
0 = x2 + -256 + -1x + -14

Reorder the terms:
0 = -256 + -14 + -1x + x2

Combine like terms: -256 + -14 = -270
0 = -270 + -1x + x2

Solving
0 = -270 + -1x + x2

Solving for variable 'x'.

Combine like terms: 0 + 270 = 270
270 + x + -1x2 = -270 + -1x + x2 + 270 + x + -1x2

Reorder the terms:
270 + x + -1x2 = -270 + 270 + -1x + x + x2 + -1x2

Combine like terms: -270 + 270 = 0
270 + x + -1x2 = 0 + -1x + x + x2 + -1x2
270 + x + -1x2 = -1x + x + x2 + -1x2

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

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

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-270 + -1x + x2 = 0

Move the constant term to the right:

Add '270' to each side of the equation.
-270 + -1x + 270 + x2 = 0 + 270

Reorder the terms:
-270 + 270 + -1x + x2 = 0 + 270

Combine like terms: -270 + 270 = 0
0 + -1x + x2 = 0 + 270
-1x + x2 = 0 + 270

Combine like terms: 0 + 270 = 270
-1x + x2 = 270

The x term is x.  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 = 270 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 270 + 0.25

Combine like terms: 270 + 0.25 = 270.25
0.25 + -1x + x2 = 270.25

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 270.25

Calculate the square root of the right side: 16.439282223

Break this problem into two subproblems by setting 
(x + 0.5) equal to 16.439282223 and -16.439282223.

Subproblem 1

x + 0.5 = 16.439282223 Simplifying x + 0.5 = 16.439282223 Reorder the terms: 0.5 + x = 16.439282223 Solving 0.5 + x = 16.439282223 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 = 16.439282223 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 16.439282223 + -0.5 x = 16.439282223 + -0.5 Combine like terms: 16.439282223 + -0.5 = 15.939282223 x = 15.939282223 Simplifying x = 15.939282223

Subproblem 2

x + 0.5 = -16.439282223 Simplifying x + 0.5 = -16.439282223 Reorder the terms: 0.5 + x = -16.439282223 Solving 0.5 + x = -16.439282223 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 = -16.439282223 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -16.439282223 + -0.5 x = -16.439282223 + -0.5 Combine like terms: -16.439282223 + -0.5 = -16.939282223 x = -16.939282223 Simplifying x = -16.939282223

Solution

The solution to the problem is based on the solutions from the subproblems. x = {15.939282223, -16.939282223}

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