p^2+8p=25

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Solution for p^2+8p=25 equation:


Simplifying
p2 + 8p = 25

Reorder the terms:
8p + p2 = 25

Solving
8p + p2 = 25

Solving for variable 'p'.

Reorder the terms:
-25 + 8p + p2 = 25 + -25

Combine like terms: 25 + -25 = 0
-25 + 8p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '25' to each side of the equation.
-25 + 8p + 25 + p2 = 0 + 25

Reorder the terms:
-25 + 25 + 8p + p2 = 0 + 25

Combine like terms: -25 + 25 = 0
0 + 8p + p2 = 0 + 25
8p + p2 = 0 + 25

Combine like terms: 0 + 25 = 25
8p + p2 = 25

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 = 25 + 16

Reorder the terms:
16 + 8p + p2 = 25 + 16

Combine like terms: 25 + 16 = 41
16 + 8p + p2 = 41

Factor a perfect square on the left side:
(p + 4)(p + 4) = 41

Calculate the square root of the right side: 6.403124237

Break this problem into two subproblems by setting 
(p + 4) equal to 6.403124237 and -6.403124237.

Subproblem 1

p + 4 = 6.403124237 Simplifying p + 4 = 6.403124237 Reorder the terms: 4 + p = 6.403124237 Solving 4 + p = 6.403124237 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 = 6.403124237 + -4 Combine like terms: 4 + -4 = 0 0 + p = 6.403124237 + -4 p = 6.403124237 + -4 Combine like terms: 6.403124237 + -4 = 2.403124237 p = 2.403124237 Simplifying p = 2.403124237

Subproblem 2

p + 4 = -6.403124237 Simplifying p + 4 = -6.403124237 Reorder the terms: 4 + p = -6.403124237 Solving 4 + p = -6.403124237 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 = -6.403124237 + -4 Combine like terms: 4 + -4 = 0 0 + p = -6.403124237 + -4 p = -6.403124237 + -4 Combine like terms: -6.403124237 + -4 = -10.403124237 p = -10.403124237 Simplifying p = -10.403124237

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.403124237, -10.403124237}

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