x^2-x-195=0

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Solution for x^2-x-195=0 equation:


Simplifying
x2 + -1x + -195 = 0

Reorder the terms:
-195 + -1x + x2 = 0

Solving
-195 + -1x + x2 = 0

Solving for variable 'x'.

Begin completing the square.

Move the constant term to the right:

Add '195' to each side of the equation.
-195 + -1x + 195 + x2 = 0 + 195

Reorder the terms:
-195 + 195 + -1x + x2 = 0 + 195

Combine like terms: -195 + 195 = 0
0 + -1x + x2 = 0 + 195
-1x + x2 = 0 + 195

Combine like terms: 0 + 195 = 195
-1x + x2 = 195

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 = 195 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 195 + 0.25

Combine like terms: 195 + 0.25 = 195.25
0.25 + -1x + x2 = 195.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 195.25

Calculate the square root of the right side: 13.973188612

Break this problem into two subproblems by setting 
(x + -0.5) equal to 13.973188612 and -13.973188612.

Subproblem 1

x + -0.5 = 13.973188612 Simplifying x + -0.5 = 13.973188612 Reorder the terms: -0.5 + x = 13.973188612 Solving -0.5 + x = 13.973188612 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 = 13.973188612 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 13.973188612 + 0.5 x = 13.973188612 + 0.5 Combine like terms: 13.973188612 + 0.5 = 14.473188612 x = 14.473188612 Simplifying x = 14.473188612

Subproblem 2

x + -0.5 = -13.973188612 Simplifying x + -0.5 = -13.973188612 Reorder the terms: -0.5 + x = -13.973188612 Solving -0.5 + x = -13.973188612 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 = -13.973188612 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -13.973188612 + 0.5 x = -13.973188612 + 0.5 Combine like terms: -13.973188612 + 0.5 = -13.473188612 x = -13.473188612 Simplifying x = -13.473188612

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.473188612, -13.473188612}

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