x^2-x-196=0

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Solution for x^2-x-196=0 equation:


Simplifying
x2 + -1x + -196 = 0

Reorder the terms:
-196 + -1x + x2 = 0

Solving
-196 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '196' to each side of the equation.
-196 + -1x + 196 + x2 = 0 + 196

Reorder the terms:
-196 + 196 + -1x + x2 = 0 + 196

Combine like terms: -196 + 196 = 0
0 + -1x + x2 = 0 + 196
-1x + x2 = 0 + 196

Combine like terms: 0 + 196 = 196
-1x + x2 = 196

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 = 196 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 196 + 0.25

Combine like terms: 196 + 0.25 = 196.25
0.25 + -1x + x2 = 196.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 196.25

Calculate the square root of the right side: 14.008925726

Break this problem into two subproblems by setting 
(x + -0.5) equal to 14.008925726 and -14.008925726.

Subproblem 1

x + -0.5 = 14.008925726 Simplifying x + -0.5 = 14.008925726 Reorder the terms: -0.5 + x = 14.008925726 Solving -0.5 + x = 14.008925726 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 = 14.008925726 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 14.008925726 + 0.5 x = 14.008925726 + 0.5 Combine like terms: 14.008925726 + 0.5 = 14.508925726 x = 14.508925726 Simplifying x = 14.508925726

Subproblem 2

x + -0.5 = -14.008925726 Simplifying x + -0.5 = -14.008925726 Reorder the terms: -0.5 + x = -14.008925726 Solving -0.5 + x = -14.008925726 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 = -14.008925726 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -14.008925726 + 0.5 x = -14.008925726 + 0.5 Combine like terms: -14.008925726 + 0.5 = -13.508925726 x = -13.508925726 Simplifying x = -13.508925726

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.508925726, -13.508925726}

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