q^2-15q=-46

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Solution for q^2-15q=-46 equation:


Simplifying
q2 + -15q = -46

Reorder the terms:
-15q + q2 = -46

Solving
-15q + q2 = -46

Solving for variable 'q'.

Reorder the terms:
46 + -15q + q2 = -46 + 46

Combine like terms: -46 + 46 = 0
46 + -15q + q2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-46' to each side of the equation.
46 + -15q + -46 + q2 = 0 + -46

Reorder the terms:
46 + -46 + -15q + q2 = 0 + -46

Combine like terms: 46 + -46 = 0
0 + -15q + q2 = 0 + -46
-15q + q2 = 0 + -46

Combine like terms: 0 + -46 = -46
-15q + q2 = -46

The q term is -15q.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15q + 56.25 + q2 = -46 + 56.25

Reorder the terms:
56.25 + -15q + q2 = -46 + 56.25

Combine like terms: -46 + 56.25 = 10.25
56.25 + -15q + q2 = 10.25

Factor a perfect square on the left side:
(q + -7.5)(q + -7.5) = 10.25

Calculate the square root of the right side: 3.201562119

Break this problem into two subproblems by setting 
(q + -7.5) equal to 3.201562119 and -3.201562119.

Subproblem 1

q + -7.5 = 3.201562119 Simplifying q + -7.5 = 3.201562119 Reorder the terms: -7.5 + q = 3.201562119 Solving -7.5 + q = 3.201562119 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + q = 3.201562119 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + q = 3.201562119 + 7.5 q = 3.201562119 + 7.5 Combine like terms: 3.201562119 + 7.5 = 10.701562119 q = 10.701562119 Simplifying q = 10.701562119

Subproblem 2

q + -7.5 = -3.201562119 Simplifying q + -7.5 = -3.201562119 Reorder the terms: -7.5 + q = -3.201562119 Solving -7.5 + q = -3.201562119 Solving for variable 'q'. Move all terms containing q to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + q = -3.201562119 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + q = -3.201562119 + 7.5 q = -3.201562119 + 7.5 Combine like terms: -3.201562119 + 7.5 = 4.298437881 q = 4.298437881 Simplifying q = 4.298437881

Solution

The solution to the problem is based on the solutions from the subproblems. q = {10.701562119, 4.298437881}

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