400-50=3q^2+6q

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Solution for 400-50=3q^2+6q equation:


Simplifying
400 + -50 = 3q2 + 6q

Combine like terms: 400 + -50 = 350
350 = 3q2 + 6q

Reorder the terms:
350 = 6q + 3q2

Solving
350 = 6q + 3q2

Solving for variable 'q'.

Reorder the terms:
350 + -6q + -3q2 = 6q + -6q + 3q2 + -3q2

Combine like terms: 6q + -6q = 0
350 + -6q + -3q2 = 0 + 3q2 + -3q2
350 + -6q + -3q2 = 3q2 + -3q2

Combine like terms: 3q2 + -3q2 = 0
350 + -6q + -3q2 = 0

Begin completing the square.  Divide all terms by
-3 the coefficient of the squared term: 

Divide each side by '-3'.
-116.6666667 + 2q + q2 = 0

Move the constant term to the right:

Add '116.6666667' to each side of the equation.
-116.6666667 + 2q + 116.6666667 + q2 = 0 + 116.6666667

Reorder the terms:
-116.6666667 + 116.6666667 + 2q + q2 = 0 + 116.6666667

Combine like terms: -116.6666667 + 116.6666667 = 0.0000000
0.0000000 + 2q + q2 = 0 + 116.6666667
2q + q2 = 0 + 116.6666667

Combine like terms: 0 + 116.6666667 = 116.6666667
2q + q2 = 116.6666667

The q term is 2q.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2q + 1 + q2 = 116.6666667 + 1

Reorder the terms:
1 + 2q + q2 = 116.6666667 + 1

Combine like terms: 116.6666667 + 1 = 117.6666667
1 + 2q + q2 = 117.6666667

Factor a perfect square on the left side:
(q + 1)(q + 1) = 117.6666667

Calculate the square root of the right side: 10.847426732

Break this problem into two subproblems by setting 
(q + 1) equal to 10.847426732 and -10.847426732.

Subproblem 1

q + 1 = 10.847426732 Simplifying q + 1 = 10.847426732 Reorder the terms: 1 + q = 10.847426732 Solving 1 + q = 10.847426732 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + q = 10.847426732 + -1 Combine like terms: 1 + -1 = 0 0 + q = 10.847426732 + -1 q = 10.847426732 + -1 Combine like terms: 10.847426732 + -1 = 9.847426732 q = 9.847426732 Simplifying q = 9.847426732

Subproblem 2

q + 1 = -10.847426732 Simplifying q + 1 = -10.847426732 Reorder the terms: 1 + q = -10.847426732 Solving 1 + q = -10.847426732 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + q = -10.847426732 + -1 Combine like terms: 1 + -1 = 0 0 + q = -10.847426732 + -1 q = -10.847426732 + -1 Combine like terms: -10.847426732 + -1 = -11.847426732 q = -11.847426732 Simplifying q = -11.847426732

Solution

The solution to the problem is based on the solutions from the subproblems. q = {9.847426732, -11.847426732}

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