q^2-15q+15=

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


Simplifying
q2 + -15q + 15 = 0

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

Solving
15 + -15q + q2 = 0

Solving for variable 'q'.

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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 = -15 + 56.25

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

Combine like terms: -15 + 56.25 = 41.25
56.25 + -15q + q2 = 41.25

Factor a perfect square on the left side:
(q + -7.5)(q + -7.5) = 41.25

Calculate the square root of the right side: 6.422616289

Break this problem into two subproblems by setting 
(q + -7.5) equal to 6.422616289 and -6.422616289.

Subproblem 1

q + -7.5 = 6.422616289 Simplifying q + -7.5 = 6.422616289 Reorder the terms: -7.5 + q = 6.422616289 Solving -7.5 + q = 6.422616289 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 = 6.422616289 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + q = 6.422616289 + 7.5 q = 6.422616289 + 7.5 Combine like terms: 6.422616289 + 7.5 = 13.922616289 q = 13.922616289 Simplifying q = 13.922616289

Subproblem 2

q + -7.5 = -6.422616289 Simplifying q + -7.5 = -6.422616289 Reorder the terms: -7.5 + q = -6.422616289 Solving -7.5 + q = -6.422616289 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 = -6.422616289 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + q = -6.422616289 + 7.5 q = -6.422616289 + 7.5 Combine like terms: -6.422616289 + 7.5 = 1.077383711 q = 1.077383711 Simplifying q = 1.077383711

Solution

The solution to the problem is based on the solutions from the subproblems. q = {13.922616289, 1.077383711}

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