p^2+8p=13

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Solution for p^2+8p=13 equation:


Simplifying
p2 + 8p = 13

Reorder the terms:
8p + p2 = 13

Solving
8p + p2 = 13

Solving for variable 'p'.

Reorder the terms:
-13 + 8p + p2 = 13 + -13

Combine like terms: 13 + -13 = 0
-13 + 8p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '13' to each side of the equation.
-13 + 8p + 13 + p2 = 0 + 13

Reorder the terms:
-13 + 13 + 8p + p2 = 0 + 13

Combine like terms: -13 + 13 = 0
0 + 8p + p2 = 0 + 13
8p + p2 = 0 + 13

Combine like terms: 0 + 13 = 13
8p + p2 = 13

The p term is 8p.  Take half its coefficient (4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
8p + 16 + p2 = 13 + 16

Reorder the terms:
16 + 8p + p2 = 13 + 16

Combine like terms: 13 + 16 = 29
16 + 8p + p2 = 29

Factor a perfect square on the left side:
(p + 4)(p + 4) = 29

Calculate the square root of the right side: 5.385164807

Break this problem into two subproblems by setting 
(p + 4) equal to 5.385164807 and -5.385164807.

Subproblem 1

p + 4 = 5.385164807 Simplifying p + 4 = 5.385164807 Reorder the terms: 4 + p = 5.385164807 Solving 4 + p = 5.385164807 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + p = 5.385164807 + -4 Combine like terms: 4 + -4 = 0 0 + p = 5.385164807 + -4 p = 5.385164807 + -4 Combine like terms: 5.385164807 + -4 = 1.385164807 p = 1.385164807 Simplifying p = 1.385164807

Subproblem 2

p + 4 = -5.385164807 Simplifying p + 4 = -5.385164807 Reorder the terms: 4 + p = -5.385164807 Solving 4 + p = -5.385164807 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-4' to each side of the equation. 4 + -4 + p = -5.385164807 + -4 Combine like terms: 4 + -4 = 0 0 + p = -5.385164807 + -4 p = -5.385164807 + -4 Combine like terms: -5.385164807 + -4 = -9.385164807 p = -9.385164807 Simplifying p = -9.385164807

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.385164807, -9.385164807}

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