-0.002x^2-0.5x+10=0

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Solution for -0.002x^2-0.5x+10=0 equation:


Simplifying
-0.002x2 + -0.5x + 10 = 0

Reorder the terms:
10 + -0.5x + -0.002x2 = 0

Solving
10 + -0.5x + -0.002x2 = 0

Solving for variable 'x'.

Begin completing the square.  Divide all terms by
-0.002 the coefficient of the squared term: 

Divide each side by '-0.002'.
-5000 + 250x + x2 = 0

Move the constant term to the right:

Add '5000' to each side of the equation.
-5000 + 250x + 5000 + x2 = 0 + 5000

Reorder the terms:
-5000 + 5000 + 250x + x2 = 0 + 5000

Combine like terms: -5000 + 5000 = 0
0 + 250x + x2 = 0 + 5000
250x + x2 = 0 + 5000

Combine like terms: 0 + 5000 = 5000
250x + x2 = 5000

The x term is 250x.  Take half its coefficient (125).
Square it (15625) and add it to both sides.

Add '15625' to each side of the equation.
250x + 15625 + x2 = 5000 + 15625

Reorder the terms:
15625 + 250x + x2 = 5000 + 15625

Combine like terms: 5000 + 15625 = 20625
15625 + 250x + x2 = 20625

Factor a perfect square on the left side:
(x + 125)(x + 125) = 20625

Calculate the square root of the right side: 143.614066163

Break this problem into two subproblems by setting 
(x + 125) equal to 143.614066163 and -143.614066163.

Subproblem 1

x + 125 = 143.614066163 Simplifying x + 125 = 143.614066163 Reorder the terms: 125 + x = 143.614066163 Solving 125 + x = 143.614066163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-125' to each side of the equation. 125 + -125 + x = 143.614066163 + -125 Combine like terms: 125 + -125 = 0 0 + x = 143.614066163 + -125 x = 143.614066163 + -125 Combine like terms: 143.614066163 + -125 = 18.614066163 x = 18.614066163 Simplifying x = 18.614066163

Subproblem 2

x + 125 = -143.614066163 Simplifying x + 125 = -143.614066163 Reorder the terms: 125 + x = -143.614066163 Solving 125 + x = -143.614066163 Solving for variable 'x'. Move all terms containing x to the left, all other terms to the right. Add '-125' to each side of the equation. 125 + -125 + x = -143.614066163 + -125 Combine like terms: 125 + -125 = 0 0 + x = -143.614066163 + -125 x = -143.614066163 + -125 Combine like terms: -143.614066163 + -125 = -268.614066163 x = -268.614066163 Simplifying x = -268.614066163

Solution

The solution to the problem is based on the solutions from the subproblems. x = {18.614066163, -268.614066163}

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