x^2-x=83

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Solution for x^2-x=83 equation:


Simplifying
x2 + -1x = 83

Reorder the terms:
-1x + x2 = 83

Solving
-1x + x2 = 83

Solving for variable 'x'.

Reorder the terms:
-83 + -1x + x2 = 83 + -83

Combine like terms: 83 + -83 = 0
-83 + -1x + x2 = 0

Begin completing the square.

Move the constant term to the right:

Add '83' to each side of the equation.
-83 + -1x + 83 + x2 = 0 + 83

Reorder the terms:
-83 + 83 + -1x + x2 = 0 + 83

Combine like terms: -83 + 83 = 0
0 + -1x + x2 = 0 + 83
-1x + x2 = 0 + 83

Combine like terms: 0 + 83 = 83
-1x + x2 = 83

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 = 83 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 83 + 0.25

Combine like terms: 83 + 0.25 = 83.25
0.25 + -1x + x2 = 83.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 83.25

Calculate the square root of the right side: 9.124143795

Break this problem into two subproblems by setting 
(x + -0.5) equal to 9.124143795 and -9.124143795.

Subproblem 1

x + -0.5 = 9.124143795 Simplifying x + -0.5 = 9.124143795 Reorder the terms: -0.5 + x = 9.124143795 Solving -0.5 + x = 9.124143795 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 = 9.124143795 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 9.124143795 + 0.5 x = 9.124143795 + 0.5 Combine like terms: 9.124143795 + 0.5 = 9.624143795 x = 9.624143795 Simplifying x = 9.624143795

Subproblem 2

x + -0.5 = -9.124143795 Simplifying x + -0.5 = -9.124143795 Reorder the terms: -0.5 + x = -9.124143795 Solving -0.5 + x = -9.124143795 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 = -9.124143795 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -9.124143795 + 0.5 x = -9.124143795 + 0.5 Combine like terms: -9.124143795 + 0.5 = -8.624143795 x = -8.624143795 Simplifying x = -8.624143795

Solution

The solution to the problem is based on the solutions from the subproblems. x = {9.624143795, -8.624143795}

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