p^2+15p+15=0

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Solution for p^2+15p+15=0 equation:


Simplifying
p2 + 15p + 15 = 0

Reorder the terms:
15 + 15p + p2 = 0

Solving
15 + 15p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-15' to each side of the equation.
15 + 15p + -15 + p2 = 0 + -15

Reorder the terms:
15 + -15 + 15p + p2 = 0 + -15

Combine like terms: 15 + -15 = 0
0 + 15p + p2 = 0 + -15
15p + p2 = 0 + -15

Combine like terms: 0 + -15 = -15
15p + p2 = -15

The p term is 15p.  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.
15p + 56.25 + p2 = -15 + 56.25

Reorder the terms:
56.25 + 15p + p2 = -15 + 56.25

Combine like terms: -15 + 56.25 = 41.25
56.25 + 15p + p2 = 41.25

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

Calculate the square root of the right side: 6.422616289

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

Subproblem 1

p + 7.5 = 6.422616289 Simplifying p + 7.5 = 6.422616289 Reorder the terms: 7.5 + p = 6.422616289 Solving 7.5 + p = 6.422616289 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + p = 6.422616289 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + p = 6.422616289 + -7.5 p = 6.422616289 + -7.5 Combine like terms: 6.422616289 + -7.5 = -1.077383711 p = -1.077383711 Simplifying p = -1.077383711

Subproblem 2

p + 7.5 = -6.422616289 Simplifying p + 7.5 = -6.422616289 Reorder the terms: 7.5 + p = -6.422616289 Solving 7.5 + p = -6.422616289 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-7.5' to each side of the equation. 7.5 + -7.5 + p = -6.422616289 + -7.5 Combine like terms: 7.5 + -7.5 = 0.0 0.0 + p = -6.422616289 + -7.5 p = -6.422616289 + -7.5 Combine like terms: -6.422616289 + -7.5 = -13.922616289 p = -13.922616289 Simplifying p = -13.922616289

Solution

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

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