10+0.5x-0.002x^2=0

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


Simplifying
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 = 268.614066163 x = 268.614066163 Simplifying x = 268.614066163

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 = -18.614066163 x = -18.614066163 Simplifying x = -18.614066163

Solution

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

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