320=0+4q+9q^2

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Solution for 320=0+4q+9q^2 equation:


Simplifying
320 = 0 + 4q + 9q2
Remove the zero:
320 = 4q + 9q2

Solving
320 = 4q + 9q2

Solving for variable 'q'.

Reorder the terms:
320 + -4q + -9q2 = 4q + -4q + 9q2 + -9q2

Combine like terms: 4q + -4q = 0
320 + -4q + -9q2 = 0 + 9q2 + -9q2
320 + -4q + -9q2 = 9q2 + -9q2

Combine like terms: 9q2 + -9q2 = 0
320 + -4q + -9q2 = 0

Begin completing the square.  Divide all terms by
-9 the coefficient of the squared term: 

Divide each side by '-9'.
-35.55555556 + 0.4444444444q + q2 = 0

Move the constant term to the right:

Add '35.55555556' to each side of the equation.
-35.55555556 + 0.4444444444q + 35.55555556 + q2 = 0 + 35.55555556

Reorder the terms:
-35.55555556 + 35.55555556 + 0.4444444444q + q2 = 0 + 35.55555556

Combine like terms: -35.55555556 + 35.55555556 = 0.00000000
0.00000000 + 0.4444444444q + q2 = 0 + 35.55555556
0.4444444444q + q2 = 0 + 35.55555556

Combine like terms: 0 + 35.55555556 = 35.55555556
0.4444444444q + q2 = 35.55555556

The q term is 0.4444444444q.  Take half its coefficient (0.2222222222).
Square it (0.04938271604) and add it to both sides.

Add '0.04938271604' to each side of the equation.
0.4444444444q + 0.04938271604 + q2 = 35.55555556 + 0.04938271604

Reorder the terms:
0.04938271604 + 0.4444444444q + q2 = 35.55555556 + 0.04938271604

Combine like terms: 35.55555556 + 0.04938271604 = 35.60493827604
0.04938271604 + 0.4444444444q + q2 = 35.60493827604

Factor a perfect square on the left side:
(q + 0.2222222222)(q + 0.2222222222) = 35.60493827604

Calculate the square root of the right side: 5.96698737

Break this problem into two subproblems by setting 
(q + 0.2222222222) equal to 5.96698737 and -5.96698737.

Subproblem 1

q + 0.2222222222 = 5.96698737 Simplifying q + 0.2222222222 = 5.96698737 Reorder the terms: 0.2222222222 + q = 5.96698737 Solving 0.2222222222 + q = 5.96698737 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + q = 5.96698737 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + q = 5.96698737 + -0.2222222222 q = 5.96698737 + -0.2222222222 Combine like terms: 5.96698737 + -0.2222222222 = 5.7447651478 q = 5.7447651478 Simplifying q = 5.7447651478

Subproblem 2

q + 0.2222222222 = -5.96698737 Simplifying q + 0.2222222222 = -5.96698737 Reorder the terms: 0.2222222222 + q = -5.96698737 Solving 0.2222222222 + q = -5.96698737 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-0.2222222222' to each side of the equation. 0.2222222222 + -0.2222222222 + q = -5.96698737 + -0.2222222222 Combine like terms: 0.2222222222 + -0.2222222222 = 0.0000000000 0.0000000000 + q = -5.96698737 + -0.2222222222 q = -5.96698737 + -0.2222222222 Combine like terms: -5.96698737 + -0.2222222222 = -6.1892095922 q = -6.1892095922 Simplifying q = -6.1892095922

Solution

The solution to the problem is based on the solutions from the subproblems. q = {5.7447651478, -6.1892095922}

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