-p^2-10*p+9=0

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Solution for -p^2-10*p+9=0 equation:


Simplifying
-1p2 + -10p + 9 = 0

Reorder the terms:
9 + -10p + -1p2 = 0

Solving
9 + -10p + -1p2 = 0

Solving for variable 'p'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-9 + 10p + p2 = 0

Move the constant term to the right:

Add '9' to each side of the equation.
-9 + 10p + 9 + p2 = 0 + 9

Reorder the terms:
-9 + 9 + 10p + p2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 10p + p2 = 0 + 9
10p + p2 = 0 + 9

Combine like terms: 0 + 9 = 9
10p + p2 = 9

The p term is 10p.  Take half its coefficient (5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
10p + 25 + p2 = 9 + 25

Reorder the terms:
25 + 10p + p2 = 9 + 25

Combine like terms: 9 + 25 = 34
25 + 10p + p2 = 34

Factor a perfect square on the left side:
(p + 5)(p + 5) = 34

Calculate the square root of the right side: 5.830951895

Break this problem into two subproblems by setting 
(p + 5) equal to 5.830951895 and -5.830951895.

Subproblem 1

p + 5 = 5.830951895 Simplifying p + 5 = 5.830951895 Reorder the terms: 5 + p = 5.830951895 Solving 5 + p = 5.830951895 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + p = 5.830951895 + -5 Combine like terms: 5 + -5 = 0 0 + p = 5.830951895 + -5 p = 5.830951895 + -5 Combine like terms: 5.830951895 + -5 = 0.830951895 p = 0.830951895 Simplifying p = 0.830951895

Subproblem 2

p + 5 = -5.830951895 Simplifying p + 5 = -5.830951895 Reorder the terms: 5 + p = -5.830951895 Solving 5 + p = -5.830951895 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-5' to each side of the equation. 5 + -5 + p = -5.830951895 + -5 Combine like terms: 5 + -5 = 0 0 + p = -5.830951895 + -5 p = -5.830951895 + -5 Combine like terms: -5.830951895 + -5 = -10.830951895 p = -10.830951895 Simplifying p = -10.830951895

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.830951895, -10.830951895}

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