6=.0002x^2-.316x+127.8

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Solution for 6=.0002x^2-.316x+127.8 equation:


Simplifying
6 = 0.0002x2 + -0.316x + 127.8

Reorder the terms:
6 = 127.8 + -0.316x + 0.0002x2

Solving
6 = 127.8 + -0.316x + 0.0002x2

Solving for variable 'x'.

Combine like terms: 6 + -127.8 = -121.8
-121.8 + 0.316x + -0.0002x2 = 127.8 + -0.316x + 0.0002x2 + -127.8 + 0.316x + -0.0002x2

Reorder the terms:
-121.8 + 0.316x + -0.0002x2 = 127.8 + -127.8 + -0.316x + 0.316x + 0.0002x2 + -0.0002x2

Combine like terms: 127.8 + -127.8 = 0.0
-121.8 + 0.316x + -0.0002x2 = 0.0 + -0.316x + 0.316x + 0.0002x2 + -0.0002x2
-121.8 + 0.316x + -0.0002x2 = -0.316x + 0.316x + 0.0002x2 + -0.0002x2

Combine like terms: -0.316x + 0.316x = 0.000
-121.8 + 0.316x + -0.0002x2 = 0.000 + 0.0002x2 + -0.0002x2
-121.8 + 0.316x + -0.0002x2 = 0.0002x2 + -0.0002x2

Combine like terms: 0.0002x2 + -0.0002x2 = 0.0000
-121.8 + 0.316x + -0.0002x2 = 0.0000

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

Divide each side by '-0.0002'.
609000 + -1580x + x2 = 0

Move the constant term to the right:

Add '-609000' to each side of the equation.
609000 + -1580x + -609000 + x2 = 0 + -609000

Reorder the terms:
609000 + -609000 + -1580x + x2 = 0 + -609000

Combine like terms: 609000 + -609000 = 0
0 + -1580x + x2 = 0 + -609000
-1580x + x2 = 0 + -609000

Combine like terms: 0 + -609000 = -609000
-1580x + x2 = -609000

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 = -609000 + 624100

Reorder the terms:
624100 + -1580x + x2 = -609000 + 624100

Combine like terms: -609000 + 624100 = 15100
624100 + -1580x + x2 = 15100

Factor a perfect square on the left side:
(x + -790)(x + -790) = 15100

Calculate the square root of the right side: 122.882057274

Break this problem into two subproblems by setting 
(x + -790) equal to 122.882057274 and -122.882057274.

Subproblem 1

x + -790 = 122.882057274 Simplifying x + -790 = 122.882057274 Reorder the terms: -790 + x = 122.882057274 Solving -790 + x = 122.882057274 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 = 122.882057274 + 790 Combine like terms: -790 + 790 = 0 0 + x = 122.882057274 + 790 x = 122.882057274 + 790 Combine like terms: 122.882057274 + 790 = 912.882057274 x = 912.882057274 Simplifying x = 912.882057274

Subproblem 2

x + -790 = -122.882057274 Simplifying x + -790 = -122.882057274 Reorder the terms: -790 + x = -122.882057274 Solving -790 + x = -122.882057274 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 = -122.882057274 + 790 Combine like terms: -790 + 790 = 0 0 + x = -122.882057274 + 790 x = -122.882057274 + 790 Combine like terms: -122.882057274 + 790 = 667.117942726 x = 667.117942726 Simplifying x = 667.117942726

Solution

The solution to the problem is based on the solutions from the subproblems. x = {912.882057274, 667.117942726}

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