39.25=x^2+x

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Solution for 39.25=x^2+x equation:


Simplifying
39.25 = x2 + x

Reorder the terms:
39.25 = x + x2

Solving
39.25 = x + x2

Solving for variable 'x'.

Reorder the terms:
39.25 + -1x + -1x2 = x + -1x + x2 + -1x2

Combine like terms: x + -1x = 0
39.25 + -1x + -1x2 = 0 + x2 + -1x2
39.25 + -1x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
39.25 + -1x + -1x2 = 0

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

Divide each side by '-1'.
-39.25 + x + x2 = 0

Move the constant term to the right:

Add '39.25' to each side of the equation.
-39.25 + x + 39.25 + x2 = 0 + 39.25

Reorder the terms:
-39.25 + 39.25 + x + x2 = 0 + 39.25

Combine like terms: -39.25 + 39.25 = 0.00
0.00 + x + x2 = 0 + 39.25
x + x2 = 0 + 39.25

Combine like terms: 0 + 39.25 = 39.25
x + x2 = 39.25

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.
 + 0.25 + x2 = 39.25 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + x2 = 39.25 + 0.25

Combine like terms: 39.25 + 0.25 = 39.5
1.25 + x2 = 39.5

Factor a perfect square on the left side:
(x + 0.5)(x + 0.5) = 39.5

Calculate the square root of the right side: 6.284902545

Break this problem into two subproblems by setting 
(x + 0.5) equal to 6.284902545 and -6.284902545.

Subproblem 1

x + 0.5 = 6.284902545 Simplifying x + 0.5 = 6.284902545 Reorder the terms: 0.5 + x = 6.284902545 Solving 0.5 + x = 6.284902545 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 = 6.284902545 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = 6.284902545 + -0.5 x = 6.284902545 + -0.5 Combine like terms: 6.284902545 + -0.5 = 5.784902545 x = 5.784902545 Simplifying x = 5.784902545

Subproblem 2

x + 0.5 = -6.284902545 Simplifying x + 0.5 = -6.284902545 Reorder the terms: 0.5 + x = -6.284902545 Solving 0.5 + x = -6.284902545 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 = -6.284902545 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + x = -6.284902545 + -0.5 x = -6.284902545 + -0.5 Combine like terms: -6.284902545 + -0.5 = -6.784902545 x = -6.784902545 Simplifying x = -6.784902545

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.784902545, -6.784902545}

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