-0.005q^2+2.5q=300

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Solution for -0.005q^2+2.5q=300 equation:


Simplifying
-0.005q2 + 2.5q = 300

Reorder the terms:
2.5q + -0.005q2 = 300

Solving
2.5q + -0.005q2 = 300

Solving for variable 'q'.

Reorder the terms:
-300 + 2.5q + -0.005q2 = 300 + -300

Combine like terms: 300 + -300 = 0
-300 + 2.5q + -0.005q2 = 0

Begin completing the square.  Divide all terms by
-0.005 the coefficient of the squared term: 

Divide each side by '-0.005'.
60000 + -500q + q2 = 0

Move the constant term to the right:

Add '-60000' to each side of the equation.
60000 + -500q + -60000 + q2 = 0 + -60000

Reorder the terms:
60000 + -60000 + -500q + q2 = 0 + -60000

Combine like terms: 60000 + -60000 = 0
0 + -500q + q2 = 0 + -60000
-500q + q2 = 0 + -60000

Combine like terms: 0 + -60000 = -60000
-500q + q2 = -60000

The q term is -500q.  Take half its coefficient (-250).
Square it (62500) and add it to both sides.

Add '62500' to each side of the equation.
-500q + 62500 + q2 = -60000 + 62500

Reorder the terms:
62500 + -500q + q2 = -60000 + 62500

Combine like terms: -60000 + 62500 = 2500
62500 + -500q + q2 = 2500

Factor a perfect square on the left side:
(q + -250)(q + -250) = 2500

Calculate the square root of the right side: 50

Break this problem into two subproblems by setting 
(q + -250) equal to 50 and -50.

Subproblem 1

q + -250 = 50 Simplifying q + -250 = 50 Reorder the terms: -250 + q = 50 Solving -250 + q = 50 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '250' to each side of the equation. -250 + 250 + q = 50 + 250 Combine like terms: -250 + 250 = 0 0 + q = 50 + 250 q = 50 + 250 Combine like terms: 50 + 250 = 300 q = 300 Simplifying q = 300

Subproblem 2

q + -250 = -50 Simplifying q + -250 = -50 Reorder the terms: -250 + q = -50 Solving -250 + q = -50 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '250' to each side of the equation. -250 + 250 + q = -50 + 250 Combine like terms: -250 + 250 = 0 0 + q = -50 + 250 q = -50 + 250 Combine like terms: -50 + 250 = 200 q = 200 Simplifying q = 200

Solution

The solution to the problem is based on the solutions from the subproblems. q = {300, 200}

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