-0.002*Q^2+0.5*Q=10

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Solution for -0.002*Q^2+0.5*Q=10 equation:


Simplifying
-0.002Q2 + 0.5Q = 10

Reorder the terms:
0.5Q + -0.002Q2 = 10

Solving
0.5Q + -0.002Q2 = 10

Solving for variable 'Q'.

Reorder the terms:
-10 + 0.5Q + -0.002Q2 = 10 + -10

Combine like terms: 10 + -10 = 0
-10 + 0.5Q + -0.002Q2 = 0

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

Divide each side by '-0.002'.
5000 + -250Q + Q2 = 0

Move the constant term to the right:

Add '-5000' to each side of the equation.
5000 + -250Q + -5000 + Q2 = 0 + -5000

Reorder the terms:
5000 + -5000 + -250Q + Q2 = 0 + -5000

Combine like terms: 5000 + -5000 = 0
0 + -250Q + Q2 = 0 + -5000
-250Q + Q2 = 0 + -5000

Combine like terms: 0 + -5000 = -5000
-250Q + Q2 = -5000

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

Add '15625' to each side of the equation.
-250Q + 15625 + Q2 = -5000 + 15625

Reorder the terms:
15625 + -250Q + Q2 = -5000 + 15625

Combine like terms: -5000 + 15625 = 10625
15625 + -250Q + Q2 = 10625

Factor a perfect square on the left side:
(Q + -125)(Q + -125) = 10625

Calculate the square root of the right side: 103.07764064

Break this problem into two subproblems by setting 
(Q + -125) equal to 103.07764064 and -103.07764064.

Subproblem 1

Q + -125 = 103.07764064 Simplifying Q + -125 = 103.07764064 Reorder the terms: -125 + Q = 103.07764064 Solving -125 + Q = 103.07764064 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '125' to each side of the equation. -125 + 125 + Q = 103.07764064 + 125 Combine like terms: -125 + 125 = 0 0 + Q = 103.07764064 + 125 Q = 103.07764064 + 125 Combine like terms: 103.07764064 + 125 = 228.07764064 Q = 228.07764064 Simplifying Q = 228.07764064

Subproblem 2

Q + -125 = -103.07764064 Simplifying Q + -125 = -103.07764064 Reorder the terms: -125 + Q = -103.07764064 Solving -125 + Q = -103.07764064 Solving for variable 'Q'. Move all terms containing Q to the left, all other terms to the right. Add '125' to each side of the equation. -125 + 125 + Q = -103.07764064 + 125 Combine like terms: -125 + 125 = 0 0 + Q = -103.07764064 + 125 Q = -103.07764064 + 125 Combine like terms: -103.07764064 + 125 = 21.92235936 Q = 21.92235936 Simplifying Q = 21.92235936

Solution

The solution to the problem is based on the solutions from the subproblems. Q = {228.07764064, 21.92235936}

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