p^2+9p+2=0

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Solution for p^2+9p+2=0 equation:


Simplifying
p2 + 9p + 2 = 0

Reorder the terms:
2 + 9p + p2 = 0

Solving
2 + 9p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-2' to each side of the equation.
2 + 9p + -2 + p2 = 0 + -2

Reorder the terms:
2 + -2 + 9p + p2 = 0 + -2

Combine like terms: 2 + -2 = 0
0 + 9p + p2 = 0 + -2
9p + p2 = 0 + -2

Combine like terms: 0 + -2 = -2
9p + p2 = -2

The p term is 9p.  Take half its coefficient (4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
9p + 20.25 + p2 = -2 + 20.25

Reorder the terms:
20.25 + 9p + p2 = -2 + 20.25

Combine like terms: -2 + 20.25 = 18.25
20.25 + 9p + p2 = 18.25

Factor a perfect square on the left side:
(p + 4.5)(p + 4.5) = 18.25

Calculate the square root of the right side: 4.272001873

Break this problem into two subproblems by setting 
(p + 4.5) equal to 4.272001873 and -4.272001873.

Subproblem 1

p + 4.5 = 4.272001873 Simplifying p + 4.5 = 4.272001873 Reorder the terms: 4.5 + p = 4.272001873 Solving 4.5 + p = 4.272001873 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + p = 4.272001873 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + p = 4.272001873 + -4.5 p = 4.272001873 + -4.5 Combine like terms: 4.272001873 + -4.5 = -0.227998127 p = -0.227998127 Simplifying p = -0.227998127

Subproblem 2

p + 4.5 = -4.272001873 Simplifying p + 4.5 = -4.272001873 Reorder the terms: 4.5 + p = -4.272001873 Solving 4.5 + p = -4.272001873 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-4.5' to each side of the equation. 4.5 + -4.5 + p = -4.272001873 + -4.5 Combine like terms: 4.5 + -4.5 = 0.0 0.0 + p = -4.272001873 + -4.5 p = -4.272001873 + -4.5 Combine like terms: -4.272001873 + -4.5 = -8.772001873 p = -8.772001873 Simplifying p = -8.772001873

Solution

The solution to the problem is based on the solutions from the subproblems. p = {-0.227998127, -8.772001873}

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