0=9x^2-360x+500

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Solution for 0=9x^2-360x+500 equation:


Simplifying
0 = 9x2 + -360x + 500

Reorder the terms:
0 = 500 + -360x + 9x2

Solving
0 = 500 + -360x + 9x2

Solving for variable 'x'.

Combine like terms: 0 + -500 = -500
-500 + 360x + -9x2 = 500 + -360x + 9x2 + -500 + 360x + -9x2

Reorder the terms:
-500 + 360x + -9x2 = 500 + -500 + -360x + 360x + 9x2 + -9x2

Combine like terms: 500 + -500 = 0
-500 + 360x + -9x2 = 0 + -360x + 360x + 9x2 + -9x2
-500 + 360x + -9x2 = -360x + 360x + 9x2 + -9x2

Combine like terms: -360x + 360x = 0
-500 + 360x + -9x2 = 0 + 9x2 + -9x2
-500 + 360x + -9x2 = 9x2 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-500 + 360x + -9x2 = 0

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
55.55555556 + -40x + x2 = 0

Move the constant term to the right:

Add '-55.55555556' to each side of the equation.
55.55555556 + -40x + -55.55555556 + x2 = 0 + -55.55555556

Reorder the terms:
55.55555556 + -55.55555556 + -40x + x2 = 0 + -55.55555556

Combine like terms: 55.55555556 + -55.55555556 = 0.00000000
0.00000000 + -40x + x2 = 0 + -55.55555556
-40x + x2 = 0 + -55.55555556

Combine like terms: 0 + -55.55555556 = -55.55555556
-40x + x2 = -55.55555556

The x term is -40x.  Take half its coefficient (-20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
-40x + 400 + x2 = -55.55555556 + 400

Reorder the terms:
400 + -40x + x2 = -55.55555556 + 400

Combine like terms: -55.55555556 + 400 = 344.44444444
400 + -40x + x2 = 344.44444444

Factor a perfect square on the left side:
(x + -20)(x + -20) = 344.44444444

Calculate the square root of the right side: 18.559214543

Break this problem into two subproblems by setting 
(x + -20) equal to 18.559214543 and -18.559214543.

Subproblem 1

x + -20 = 18.559214543 Simplifying x + -20 = 18.559214543 Reorder the terms: -20 + x = 18.559214543 Solving -20 + x = 18.559214543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = 18.559214543 + 20 Combine like terms: -20 + 20 = 0 0 + x = 18.559214543 + 20 x = 18.559214543 + 20 Combine like terms: 18.559214543 + 20 = 38.559214543 x = 38.559214543 Simplifying x = 38.559214543

Subproblem 2

x + -20 = -18.559214543 Simplifying x + -20 = -18.559214543 Reorder the terms: -20 + x = -18.559214543 Solving -20 + x = -18.559214543 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '20' to each side of the equation. -20 + 20 + x = -18.559214543 + 20 Combine like terms: -20 + 20 = 0 0 + x = -18.559214543 + 20 x = -18.559214543 + 20 Combine like terms: -18.559214543 + 20 = 1.440785457 x = 1.440785457 Simplifying x = 1.440785457

Solution

The solution to the problem is based on the solutions from the subproblems. x = {38.559214543, 1.440785457}

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