p^2+4p-256=0

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Solution for p^2+4p-256=0 equation:


Simplifying
p2 + 4p + -256 = 0

Reorder the terms:
-256 + 4p + p2 = 0

Solving
-256 + 4p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '256' to each side of the equation.
-256 + 4p + 256 + p2 = 0 + 256

Reorder the terms:
-256 + 256 + 4p + p2 = 0 + 256

Combine like terms: -256 + 256 = 0
0 + 4p + p2 = 0 + 256
4p + p2 = 0 + 256

Combine like terms: 0 + 256 = 256
4p + p2 = 256

The p term is 4p.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4p + 4 + p2 = 256 + 4

Reorder the terms:
4 + 4p + p2 = 256 + 4

Combine like terms: 256 + 4 = 260
4 + 4p + p2 = 260

Factor a perfect square on the left side:
(p + 2)(p + 2) = 260

Calculate the square root of the right side: 16.124515497

Break this problem into two subproblems by setting 
(p + 2) equal to 16.124515497 and -16.124515497.

Subproblem 1

p + 2 = 16.124515497 Simplifying p + 2 = 16.124515497 Reorder the terms: 2 + p = 16.124515497 Solving 2 + p = 16.124515497 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = 16.124515497 + -2 Combine like terms: 2 + -2 = 0 0 + p = 16.124515497 + -2 p = 16.124515497 + -2 Combine like terms: 16.124515497 + -2 = 14.124515497 p = 14.124515497 Simplifying p = 14.124515497

Subproblem 2

p + 2 = -16.124515497 Simplifying p + 2 = -16.124515497 Reorder the terms: 2 + p = -16.124515497 Solving 2 + p = -16.124515497 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = -16.124515497 + -2 Combine like terms: 2 + -2 = 0 0 + p = -16.124515497 + -2 p = -16.124515497 + -2 Combine like terms: -16.124515497 + -2 = -18.124515497 p = -18.124515497 Simplifying p = -18.124515497

Solution

The solution to the problem is based on the solutions from the subproblems. p = {14.124515497, -18.124515497}

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