0=-0.0001x^2+-0.0008x+.19

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Solution for 0=-0.0001x^2+-0.0008x+.19 equation:


Simplifying
0 = -0.0001x2 + -0.0008x + 0.19

Reorder the terms:
0 = 0.19 + -0.0008x + -0.0001x2

Solving
0 = 0.19 + -0.0008x + -0.0001x2

Solving for variable 'x'.

Combine like terms: 0 + -0.19 = -0.19
-0.19 + 0.0008x + 0.0001x2 = 0.19 + -0.0008x + -0.0001x2 + -0.19 + 0.0008x + 0.0001x2

Reorder the terms:
-0.19 + 0.0008x + 0.0001x2 = 0.19 + -0.19 + -0.0008x + 0.0008x + -0.0001x2 + 0.0001x2

Combine like terms: 0.19 + -0.19 = 0.00
-0.19 + 0.0008x + 0.0001x2 = 0.00 + -0.0008x + 0.0008x + -0.0001x2 + 0.0001x2
-0.19 + 0.0008x + 0.0001x2 = -0.0008x + 0.0008x + -0.0001x2 + 0.0001x2

Combine like terms: -0.0008x + 0.0008x = 0.0000
-0.19 + 0.0008x + 0.0001x2 = 0.0000 + -0.0001x2 + 0.0001x2
-0.19 + 0.0008x + 0.0001x2 = -0.0001x2 + 0.0001x2

Combine like terms: -0.0001x2 + 0.0001x2 = 0.0000
-0.19 + 0.0008x + 0.0001x2 = 0.0000

Begin completing the square.  Divide all terms by
0.0001 the coefficient of the squared term: 

Divide each side by '0.0001'.
-1900 + 8x + x2 = 0

Move the constant term to the right:

Add '1900' to each side of the equation.
-1900 + 8x + 1900 + x2 = 0 + 1900

Reorder the terms:
-1900 + 1900 + 8x + x2 = 0 + 1900

Combine like terms: -1900 + 1900 = 0
0 + 8x + x2 = 0 + 1900
8x + x2 = 0 + 1900

Combine like terms: 0 + 1900 = 1900
8x + x2 = 1900

The x term is 8x.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8x + 16 + x2 = 1900 + 16

Reorder the terms:
16 + 8x + x2 = 1900 + 16

Combine like terms: 1900 + 16 = 1916
16 + 8x + x2 = 1916

Factor a perfect square on the left side:
(x + 4)(x + 4) = 1916

Calculate the square root of the right side: 43.772137256

Break this problem into two subproblems by setting 
(x + 4) equal to 43.772137256 and -43.772137256.

Subproblem 1

x + 4 = 43.772137256 Simplifying x + 4 = 43.772137256 Reorder the terms: 4 + x = 43.772137256 Solving 4 + x = 43.772137256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = 43.772137256 + -4 Combine like terms: 4 + -4 = 0 0 + x = 43.772137256 + -4 x = 43.772137256 + -4 Combine like terms: 43.772137256 + -4 = 39.772137256 x = 39.772137256 Simplifying x = 39.772137256

Subproblem 2

x + 4 = -43.772137256 Simplifying x + 4 = -43.772137256 Reorder the terms: 4 + x = -43.772137256 Solving 4 + x = -43.772137256 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + x = -43.772137256 + -4 Combine like terms: 4 + -4 = 0 0 + x = -43.772137256 + -4 x = -43.772137256 + -4 Combine like terms: -43.772137256 + -4 = -47.772137256 x = -47.772137256 Simplifying x = -47.772137256

Solution

The solution to the problem is based on the solutions from the subproblems. x = {39.772137256, -47.772137256}

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