.0002x^2-.316x+123.9=0

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Solution for .0002x^2-.316x+123.9=0 equation:


Simplifying
0.0002x2 + -0.316x + 123.9 = 0

Reorder the terms:
123.9 + -0.316x + 0.0002x2 = 0

Solving
123.9 + -0.316x + 0.0002x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
0.0002 the coefficient of the squared term: 

Divide each side by '0.0002'.
619500 + -1580x + x2 = 0

Move the constant term to the right:

Add '-619500' to each side of the equation.
619500 + -1580x + -619500 + x2 = 0 + -619500

Reorder the terms:
619500 + -619500 + -1580x + x2 = 0 + -619500

Combine like terms: 619500 + -619500 = 0
0 + -1580x + x2 = 0 + -619500
-1580x + x2 = 0 + -619500

Combine like terms: 0 + -619500 = -619500
-1580x + x2 = -619500

The x term is -1580x.  Take half its coefficient (-790).
Square it (624100) and add it to both sides.

Add '624100' to each side of the equation.
-1580x + 624100 + x2 = -619500 + 624100

Reorder the terms:
624100 + -1580x + x2 = -619500 + 624100

Combine like terms: -619500 + 624100 = 4600
624100 + -1580x + x2 = 4600

Factor a perfect square on the left side:
(x + -790)(x + -790) = 4600

Calculate the square root of the right side: 67.823299831

Break this problem into two subproblems by setting 
(x + -790) equal to 67.823299831 and -67.823299831.

Subproblem 1

x + -790 = 67.823299831 Simplifying x + -790 = 67.823299831 Reorder the terms: -790 + x = 67.823299831 Solving -790 + x = 67.823299831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '790' to each side of the equation. -790 + 790 + x = 67.823299831 + 790 Combine like terms: -790 + 790 = 0 0 + x = 67.823299831 + 790 x = 67.823299831 + 790 Combine like terms: 67.823299831 + 790 = 857.823299831 x = 857.823299831 Simplifying x = 857.823299831

Subproblem 2

x + -790 = -67.823299831 Simplifying x + -790 = -67.823299831 Reorder the terms: -790 + x = -67.823299831 Solving -790 + x = -67.823299831 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '790' to each side of the equation. -790 + 790 + x = -67.823299831 + 790 Combine like terms: -790 + 790 = 0 0 + x = -67.823299831 + 790 x = -67.823299831 + 790 Combine like terms: -67.823299831 + 790 = 722.176700169 x = 722.176700169 Simplifying x = 722.176700169

Solution

The solution to the problem is based on the solutions from the subproblems. x = {857.823299831, 722.176700169}

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