519.84=x(x+22.8)

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Solution for 519.84=x(x+22.8) equation:


Simplifying
519.84 = x(x + 22.8)

Reorder the terms:
519.84 = x(22.8 + x)
519.84 = (22.8 * x + x * x)
519.84 = (22.8x + x2)

Solving
519.84 = 22.8x + x2

Solving for variable 'x'.

Reorder the terms:
519.84 + -22.8x + -1x2 = 22.8x + -22.8x + x2 + -1x2

Combine like terms: 22.8x + -22.8x = 0.0
519.84 + -22.8x + -1x2 = 0.0 + x2 + -1x2
519.84 + -22.8x + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
519.84 + -22.8x + -1x2 = 0

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

Divide each side by '-1'.
-519.84 + 22.8x + x2 = 0

Move the constant term to the right:

Add '519.84' to each side of the equation.
-519.84 + 22.8x + 519.84 + x2 = 0 + 519.84

Reorder the terms:
-519.84 + 519.84 + 22.8x + x2 = 0 + 519.84

Combine like terms: -519.84 + 519.84 = 0.00
0.00 + 22.8x + x2 = 0 + 519.84
22.8x + x2 = 0 + 519.84

Combine like terms: 0 + 519.84 = 519.84
22.8x + x2 = 519.84

The x term is 22.8x.  Take half its coefficient (11.4).
Square it (129.96) and add it to both sides.

Add '129.96' to each side of the equation.
22.8x + 129.96 + x2 = 519.84 + 129.96

Reorder the terms:
129.96 + 22.8x + x2 = 519.84 + 129.96

Combine like terms: 519.84 + 129.96 = 649.8
129.96 + 22.8x + x2 = 649.8

Factor a perfect square on the left side:
(x + 11.4)(x + 11.4) = 649.8

Calculate the square root of the right side: 25.491174943

Break this problem into two subproblems by setting 
(x + 11.4) equal to 25.491174943 and -25.491174943.

Subproblem 1

x + 11.4 = 25.491174943 Simplifying x + 11.4 = 25.491174943 Reorder the terms: 11.4 + x = 25.491174943 Solving 11.4 + x = 25.491174943 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.4' to each side of the equation. 11.4 + -11.4 + x = 25.491174943 + -11.4 Combine like terms: 11.4 + -11.4 = 0.0 0.0 + x = 25.491174943 + -11.4 x = 25.491174943 + -11.4 Combine like terms: 25.491174943 + -11.4 = 14.091174943 x = 14.091174943 Simplifying x = 14.091174943

Subproblem 2

x + 11.4 = -25.491174943 Simplifying x + 11.4 = -25.491174943 Reorder the terms: 11.4 + x = -25.491174943 Solving 11.4 + x = -25.491174943 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-11.4' to each side of the equation. 11.4 + -11.4 + x = -25.491174943 + -11.4 Combine like terms: 11.4 + -11.4 = 0.0 0.0 + x = -25.491174943 + -11.4 x = -25.491174943 + -11.4 Combine like terms: -25.491174943 + -11.4 = -36.891174943 x = -36.891174943 Simplifying x = -36.891174943

Solution

The solution to the problem is based on the solutions from the subproblems. x = {14.091174943, -36.891174943}

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