-0.0002x^2-0.008x+0.05=0

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Solution for -0.0002x^2-0.008x+0.05=0 equation:


Simplifying
-0.0002x2 + -0.008x + 0.05 = 0

Reorder the terms:
0.05 + -0.008x + -0.0002x2 = 0

Solving
0.05 + -0.008x + -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'.
-250 + 40x + x2 = 0

Move the constant term to the right:

Add '250' to each side of the equation.
-250 + 40x + 250 + x2 = 0 + 250

Reorder the terms:
-250 + 250 + 40x + x2 = 0 + 250

Combine like terms: -250 + 250 = 0
0 + 40x + x2 = 0 + 250
40x + x2 = 0 + 250

Combine like terms: 0 + 250 = 250
40x + x2 = 250

The x term is 40x.  Take half its coefficient (20).
Square it (400) and add it to both sides.

Add '400' to each side of the equation.
40x + 400 + x2 = 250 + 400

Reorder the terms:
400 + 40x + x2 = 250 + 400

Combine like terms: 250 + 400 = 650
400 + 40x + x2 = 650

Factor a perfect square on the left side:
(x + 20)(x + 20) = 650

Calculate the square root of the right side: 25.495097568

Break this problem into two subproblems by setting 
(x + 20) equal to 25.495097568 and -25.495097568.

Subproblem 1

x + 20 = 25.495097568 Simplifying x + 20 = 25.495097568 Reorder the terms: 20 + x = 25.495097568 Solving 20 + x = 25.495097568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = 25.495097568 + -20 Combine like terms: 20 + -20 = 0 0 + x = 25.495097568 + -20 x = 25.495097568 + -20 Combine like terms: 25.495097568 + -20 = 5.495097568 x = 5.495097568 Simplifying x = 5.495097568

Subproblem 2

x + 20 = -25.495097568 Simplifying x + 20 = -25.495097568 Reorder the terms: 20 + x = -25.495097568 Solving 20 + x = -25.495097568 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-20' to each side of the equation. 20 + -20 + x = -25.495097568 + -20 Combine like terms: 20 + -20 = 0 0 + x = -25.495097568 + -20 x = -25.495097568 + -20 Combine like terms: -25.495097568 + -20 = -45.495097568 x = -45.495097568 Simplifying x = -45.495097568

Solution

The solution to the problem is based on the solutions from the subproblems. x = {5.495097568, -45.495097568}

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