p^2+4p=-1

Solution for p^2+4p=-1 equation:

Simplifying
p2 + 4p = -1

Reorder the terms:
4p + p2 = -1

Solving
4p + p2 = -1

Solving for variable 'p'.

Reorder the terms:
1 + 4p + p2 = -1 + 1

Combine like terms: -1 + 1 = 0
1 + 4p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-1' to each side of the equation.
1 + 4p + -1 + p2 = 0 + -1

Reorder the terms:
1 + -1 + 4p + p2 = 0 + -1

Combine like terms: 1 + -1 = 0
0 + 4p + p2 = 0 + -1
4p + p2 = 0 + -1

Combine like terms: 0 + -1 = -1
4p + p2 = -1

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 = -1 + 4

Reorder the terms:
4 + 4p + p2 = -1 + 4

Combine like terms: -1 + 4 = 3
4 + 4p + p2 = 3

Factor a perfect square on the left side:
(p + 2)(p + 2) = 3

Calculate the square root of the right side: 1.732050808

Break this problem into two subproblems by setting 
(p + 2) equal to 1.732050808 and -1.732050808.

Subproblem 1
p + 2 = 1.732050808

Simplifying
p + 2 = 1.732050808

Reorder the terms:
2 + p = 1.732050808

Solving
2 + p = 1.732050808

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 = 1.732050808 + -2

Combine like terms: 2 + -2 = 0
0 + p = 1.732050808 + -2
p = 1.732050808 + -2

Combine like terms: 1.732050808 + -2 = -0.267949192
p = -0.267949192

Simplifying
p = -0.267949192

Subproblem 2
p + 2 = -1.732050808

Simplifying
p + 2 = -1.732050808

Reorder the terms:
2 + p = -1.732050808

Solving
2 + p = -1.732050808

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 = -1.732050808 + -2

Combine like terms: 2 + -2 = 0
0 + p = -1.732050808 + -2
p = -1.732050808 + -2

Combine like terms: -1.732050808 + -2 = -3.732050808
p = -3.732050808

Simplifying
p = -3.732050808

Solution
The solution to the problem is based on the solutions
from the subproblems.
p = {-0.267949192, -3.732050808}