62=0.5(x^2-x)

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Solution for 62=0.5(x^2-x) equation:


Simplifying
62 = 0.5(x2 + -1x)

Reorder the terms:
62 = 0.5(-1x + x2)
62 = (-1x * 0.5 + x2 * 0.5)
62 = (-0.5x + 0.5x2)

Solving
62 = -0.5x + 0.5x2

Solving for variable 'x'.

Reorder the terms:
62 + 0.5x + -0.5x2 = -0.5x + 0.5x + 0.5x2 + -0.5x2

Combine like terms: -0.5x + 0.5x = 0.0
62 + 0.5x + -0.5x2 = 0.0 + 0.5x2 + -0.5x2
62 + 0.5x + -0.5x2 = 0.5x2 + -0.5x2

Combine like terms: 0.5x2 + -0.5x2 = 0.0
62 + 0.5x + -0.5x2 = 0.0

Begin completing the square.  Divide all terms by
-0.5 the coefficient of the squared term: 

Divide each side by '-0.5'.
-124 + -1x + x2 = 0

Move the constant term to the right:

Add '124' to each side of the equation.
-124 + -1x + 124 + x2 = 0 + 124

Reorder the terms:
-124 + 124 + -1x + x2 = 0 + 124

Combine like terms: -124 + 124 = 0
0 + -1x + x2 = 0 + 124
-1x + x2 = 0 + 124

Combine like terms: 0 + 124 = 124
-1x + x2 = 124

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 = 124 + 0.25

Reorder the terms:
0.25 + -1x + x2 = 124 + 0.25

Combine like terms: 124 + 0.25 = 124.25
0.25 + -1x + x2 = 124.25

Factor a perfect square on the left side:
(x + -0.5)(x + -0.5) = 124.25

Calculate the square root of the right side: 11.146748405

Break this problem into two subproblems by setting 
(x + -0.5) equal to 11.146748405 and -11.146748405.

Subproblem 1

x + -0.5 = 11.146748405 Simplifying x + -0.5 = 11.146748405 Reorder the terms: -0.5 + x = 11.146748405 Solving -0.5 + x = 11.146748405 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 = 11.146748405 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = 11.146748405 + 0.5 x = 11.146748405 + 0.5 Combine like terms: 11.146748405 + 0.5 = 11.646748405 x = 11.646748405 Simplifying x = 11.646748405

Subproblem 2

x + -0.5 = -11.146748405 Simplifying x + -0.5 = -11.146748405 Reorder the terms: -0.5 + x = -11.146748405 Solving -0.5 + x = -11.146748405 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 = -11.146748405 + 0.5 Combine like terms: -0.5 + 0.5 = 0.0 0.0 + x = -11.146748405 + 0.5 x = -11.146748405 + 0.5 Combine like terms: -11.146748405 + 0.5 = -10.646748405 x = -10.646748405 Simplifying x = -10.646748405

Solution

The solution to the problem is based on the solutions from the subproblems. x = {11.646748405, -10.646748405}

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