5q^2-6q=4q-8q+63

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Solution for 5q^2-6q=4q-8q+63 equation:


Simplifying
5q2 + -6q = 4q + -8q + 63

Reorder the terms:
-6q + 5q2 = 4q + -8q + 63

Reorder the terms:
-6q + 5q2 = 63 + 4q + -8q

Combine like terms: 4q + -8q = -4q
-6q + 5q2 = 63 + -4q

Solving
-6q + 5q2 = 63 + -4q

Solving for variable 'q'.

Reorder the terms:
-63 + -6q + 4q + 5q2 = 63 + -4q + -63 + 4q

Combine like terms: -6q + 4q = -2q
-63 + -2q + 5q2 = 63 + -4q + -63 + 4q

Reorder the terms:
-63 + -2q + 5q2 = 63 + -63 + -4q + 4q

Combine like terms: 63 + -63 = 0
-63 + -2q + 5q2 = 0 + -4q + 4q
-63 + -2q + 5q2 = -4q + 4q

Combine like terms: -4q + 4q = 0
-63 + -2q + 5q2 = 0

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

Divide each side by '5'.
-12.6 + -0.4q + q2 = 0

Move the constant term to the right:

Add '12.6' to each side of the equation.
-12.6 + -0.4q + 12.6 + q2 = 0 + 12.6

Reorder the terms:
-12.6 + 12.6 + -0.4q + q2 = 0 + 12.6

Combine like terms: -12.6 + 12.6 = 0.0
0.0 + -0.4q + q2 = 0 + 12.6
-0.4q + q2 = 0 + 12.6

Combine like terms: 0 + 12.6 = 12.6
-0.4q + q2 = 12.6

The q term is -0.4q.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4q + 0.04 + q2 = 12.6 + 0.04

Reorder the terms:
0.04 + -0.4q + q2 = 12.6 + 0.04

Combine like terms: 12.6 + 0.04 = 12.64
0.04 + -0.4q + q2 = 12.64

Factor a perfect square on the left side:
(q + -0.2)(q + -0.2) = 12.64

Calculate the square root of the right side: 3.555277767

Break this problem into two subproblems by setting 
(q + -0.2) equal to 3.555277767 and -3.555277767.

Subproblem 1

q + -0.2 = 3.555277767 Simplifying q + -0.2 = 3.555277767 Reorder the terms: -0.2 + q = 3.555277767 Solving -0.2 + q = 3.555277767 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + q = 3.555277767 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + q = 3.555277767 + 0.2 q = 3.555277767 + 0.2 Combine like terms: 3.555277767 + 0.2 = 3.755277767 q = 3.755277767 Simplifying q = 3.755277767

Subproblem 2

q + -0.2 = -3.555277767 Simplifying q + -0.2 = -3.555277767 Reorder the terms: -0.2 + q = -3.555277767 Solving -0.2 + q = -3.555277767 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + q = -3.555277767 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + q = -3.555277767 + 0.2 q = -3.555277767 + 0.2 Combine like terms: -3.555277767 + 0.2 = -3.355277767 q = -3.355277767 Simplifying q = -3.355277767

Solution

The solution to the problem is based on the solutions from the subproblems. q = {3.755277767, -3.355277767}

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