.0002x^2-.316x+127.9=8

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Solution for .0002x^2-.316x+127.9=8 equation:


Simplifying
0.0002x2 + -0.316x + 127.9 = 8

Reorder the terms:
127.9 + -0.316x + 0.0002x2 = 8

Solving
127.9 + -0.316x + 0.0002x2 = 8

Solving for variable 'x'.

Reorder the terms:
127.9 + -8 + -0.316x + 0.0002x2 = 8 + -8

Combine like terms: 127.9 + -8 = 119.9
119.9 + -0.316x + 0.0002x2 = 8 + -8

Combine like terms: 8 + -8 = 0
119.9 + -0.316x + 0.0002x2 = 0

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

Divide each side by '0.0002'.
599500 + -1580x + x2 = 0

Move the constant term to the right:

Add '-599500' to each side of the equation.
599500 + -1580x + -599500 + x2 = 0 + -599500

Reorder the terms:
599500 + -599500 + -1580x + x2 = 0 + -599500

Combine like terms: 599500 + -599500 = 0
0 + -1580x + x2 = 0 + -599500
-1580x + x2 = 0 + -599500

Combine like terms: 0 + -599500 = -599500
-1580x + x2 = -599500

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 = -599500 + 624100

Reorder the terms:
624100 + -1580x + x2 = -599500 + 624100

Combine like terms: -599500 + 624100 = 24600
624100 + -1580x + x2 = 24600

Factor a perfect square on the left side:
(x + -790)(x + -790) = 24600

Calculate the square root of the right side: 156.843871414

Break this problem into two subproblems by setting 
(x + -790) equal to 156.843871414 and -156.843871414.

Subproblem 1

x + -790 = 156.843871414 Simplifying x + -790 = 156.843871414 Reorder the terms: -790 + x = 156.843871414 Solving -790 + x = 156.843871414 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 = 156.843871414 + 790 Combine like terms: -790 + 790 = 0 0 + x = 156.843871414 + 790 x = 156.843871414 + 790 Combine like terms: 156.843871414 + 790 = 946.843871414 x = 946.843871414 Simplifying x = 946.843871414

Subproblem 2

x + -790 = -156.843871414 Simplifying x + -790 = -156.843871414 Reorder the terms: -790 + x = -156.843871414 Solving -790 + x = -156.843871414 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 = -156.843871414 + 790 Combine like terms: -790 + 790 = 0 0 + x = -156.843871414 + 790 x = -156.843871414 + 790 Combine like terms: -156.843871414 + 790 = 633.156128586 x = 633.156128586 Simplifying x = 633.156128586

Solution

The solution to the problem is based on the solutions from the subproblems. x = {946.843871414, 633.156128586}

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