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

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


Simplifying
x = 0.0002x2 + -0.316x + 127.9

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

Solving
x = 127.9 + -0.316x + 0.0002x2

Solving for variable 'x'.

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

Combine like terms: x + 0.316x = 1.316x
-127.9 + 1.316x + -0.0002x2 = 127.9 + -0.316x + 0.0002x2 + -127.9 + 0.316x + -0.0002x2

Reorder the terms:
-127.9 + 1.316x + -0.0002x2 = 127.9 + -127.9 + -0.316x + 0.316x + 0.0002x2 + -0.0002x2

Combine like terms: 127.9 + -127.9 = 0.0
-127.9 + 1.316x + -0.0002x2 = 0.0 + -0.316x + 0.316x + 0.0002x2 + -0.0002x2
-127.9 + 1.316x + -0.0002x2 = -0.316x + 0.316x + 0.0002x2 + -0.0002x2

Combine like terms: -0.316x + 0.316x = 0.000
-127.9 + 1.316x + -0.0002x2 = 0.000 + 0.0002x2 + -0.0002x2
-127.9 + 1.316x + -0.0002x2 = 0.0002x2 + -0.0002x2

Combine like terms: 0.0002x2 + -0.0002x2 = 0.0000
-127.9 + 1.316x + -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'.
639500 + -6580x + x2 = 0

Move the constant term to the right:

Add '-639500' to each side of the equation.
639500 + -6580x + -639500 + x2 = 0 + -639500

Reorder the terms:
639500 + -639500 + -6580x + x2 = 0 + -639500

Combine like terms: 639500 + -639500 = 0
0 + -6580x + x2 = 0 + -639500
-6580x + x2 = 0 + -639500

Combine like terms: 0 + -639500 = -639500
-6580x + x2 = -639500

The x term is -6580x.  Take half its coefficient (-3290).
Square it (10824100) and add it to both sides.

Add '10824100' to each side of the equation.
-6580x + 10824100 + x2 = -639500 + 10824100

Reorder the terms:
10824100 + -6580x + x2 = -639500 + 10824100

Combine like terms: -639500 + 10824100 = 10184600
10824100 + -6580x + x2 = 10184600

Factor a perfect square on the left side:
(x + -3290)(x + -3290) = 10184600

Calculate the square root of the right side: 3191.332010305

Break this problem into two subproblems by setting 
(x + -3290) equal to 3191.332010305 and -3191.332010305.

Subproblem 1

x + -3290 = 3191.332010305 Simplifying x + -3290 = 3191.332010305 Reorder the terms: -3290 + x = 3191.332010305 Solving -3290 + x = 3191.332010305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3290' to each side of the equation. -3290 + 3290 + x = 3191.332010305 + 3290 Combine like terms: -3290 + 3290 = 0 0 + x = 3191.332010305 + 3290 x = 3191.332010305 + 3290 Combine like terms: 3191.332010305 + 3290 = 6481.332010305 x = 6481.332010305 Simplifying x = 6481.332010305

Subproblem 2

x + -3290 = -3191.332010305 Simplifying x + -3290 = -3191.332010305 Reorder the terms: -3290 + x = -3191.332010305 Solving -3290 + x = -3191.332010305 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '3290' to each side of the equation. -3290 + 3290 + x = -3191.332010305 + 3290 Combine like terms: -3290 + 3290 = 0 0 + x = -3191.332010305 + 3290 x = -3191.332010305 + 3290 Combine like terms: -3191.332010305 + 3290 = 98.667989695 x = 98.667989695 Simplifying x = 98.667989695

Solution

The solution to the problem is based on the solutions from the subproblems. x = {6481.332010305, 98.667989695}

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