650-5p-p^2=0

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Solution for 650-5p-p^2=0 equation:


Simplifying
650 + -5p + -1p2 = 0

Solving
650 + -5p + -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'.
-650 + 5p + p2 = 0

Move the constant term to the right:

Add '650' to each side of the equation.
-650 + 5p + 650 + p2 = 0 + 650

Reorder the terms:
-650 + 650 + 5p + p2 = 0 + 650

Combine like terms: -650 + 650 = 0
0 + 5p + p2 = 0 + 650
5p + p2 = 0 + 650

Combine like terms: 0 + 650 = 650
5p + p2 = 650

The p term is 5p.  Take half its coefficient (2.5).
Square it (6.25) and add it to both sides.

Add '6.25' to each side of the equation.
5p + 6.25 + p2 = 650 + 6.25

Reorder the terms:
6.25 + 5p + p2 = 650 + 6.25

Combine like terms: 650 + 6.25 = 656.25
6.25 + 5p + p2 = 656.25

Factor a perfect square on the left side:
(p + 2.5)(p + 2.5) = 656.25

Calculate the square root of the right side: 25.617376915

Break this problem into two subproblems by setting 
(p + 2.5) equal to 25.617376915 and -25.617376915.

Subproblem 1

p + 2.5 = 25.617376915 Simplifying p + 2.5 = 25.617376915 Reorder the terms: 2.5 + p = 25.617376915 Solving 2.5 + p = 25.617376915 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + p = 25.617376915 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + p = 25.617376915 + -2.5 p = 25.617376915 + -2.5 Combine like terms: 25.617376915 + -2.5 = 23.117376915 p = 23.117376915 Simplifying p = 23.117376915

Subproblem 2

p + 2.5 = -25.617376915 Simplifying p + 2.5 = -25.617376915 Reorder the terms: 2.5 + p = -25.617376915 Solving 2.5 + p = -25.617376915 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2.5' to each side of the equation. 2.5 + -2.5 + p = -25.617376915 + -2.5 Combine like terms: 2.5 + -2.5 = 0.0 0.0 + p = -25.617376915 + -2.5 p = -25.617376915 + -2.5 Combine like terms: -25.617376915 + -2.5 = -28.117376915 p = -28.117376915 Simplifying p = -28.117376915

Solution

The solution to the problem is based on the solutions from the subproblems. p = {23.117376915, -28.117376915}

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