p^2-8p=36

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Solution for p^2-8p=36 equation:


Simplifying
p2 + -8p = 36

Reorder the terms:
-8p + p2 = 36

Solving
-8p + p2 = 36

Solving for variable 'p'.

Reorder the terms:
-36 + -8p + p2 = 36 + -36

Combine like terms: 36 + -36 = 0
-36 + -8p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '36' to each side of the equation.
-36 + -8p + 36 + p2 = 0 + 36

Reorder the terms:
-36 + 36 + -8p + p2 = 0 + 36

Combine like terms: -36 + 36 = 0
0 + -8p + p2 = 0 + 36
-8p + p2 = 0 + 36

Combine like terms: 0 + 36 = 36
-8p + p2 = 36

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 = 36 + 16

Reorder the terms:
16 + -8p + p2 = 36 + 16

Combine like terms: 36 + 16 = 52
16 + -8p + p2 = 52

Factor a perfect square on the left side:
(p + -4)(p + -4) = 52

Calculate the square root of the right side: 7.211102551

Break this problem into two subproblems by setting 
(p + -4) equal to 7.211102551 and -7.211102551.

Subproblem 1

p + -4 = 7.211102551 Simplifying p + -4 = 7.211102551 Reorder the terms: -4 + p = 7.211102551 Solving -4 + p = 7.211102551 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 = 7.211102551 + 4 Combine like terms: -4 + 4 = 0 0 + p = 7.211102551 + 4 p = 7.211102551 + 4 Combine like terms: 7.211102551 + 4 = 11.211102551 p = 11.211102551 Simplifying p = 11.211102551

Subproblem 2

p + -4 = -7.211102551 Simplifying p + -4 = -7.211102551 Reorder the terms: -4 + p = -7.211102551 Solving -4 + p = -7.211102551 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 = -7.211102551 + 4 Combine like terms: -4 + 4 = 0 0 + p = -7.211102551 + 4 p = -7.211102551 + 4 Combine like terms: -7.211102551 + 4 = -3.211102551 p = -3.211102551 Simplifying p = -3.211102551

Solution

The solution to the problem is based on the solutions from the subproblems. p = {11.211102551, -3.211102551}

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