p^2+18p=49

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Solution for p^2+18p=49 equation:


Simplifying
p2 + 18p = 49

Reorder the terms:
18p + p2 = 49

Solving
18p + p2 = 49

Solving for variable 'p'.

Reorder the terms:
-49 + 18p + p2 = 49 + -49

Combine like terms: 49 + -49 = 0
-49 + 18p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '49' to each side of the equation.
-49 + 18p + 49 + p2 = 0 + 49

Reorder the terms:
-49 + 49 + 18p + p2 = 0 + 49

Combine like terms: -49 + 49 = 0
0 + 18p + p2 = 0 + 49
18p + p2 = 0 + 49

Combine like terms: 0 + 49 = 49
18p + p2 = 49

The p term is 18p.  Take half its coefficient (9).
Square it (81) and add it to both sides.

Add '81' to each side of the equation.
18p + 81 + p2 = 49 + 81

Reorder the terms:
81 + 18p + p2 = 49 + 81

Combine like terms: 49 + 81 = 130
81 + 18p + p2 = 130

Factor a perfect square on the left side:
(p + 9)(p + 9) = 130

Calculate the square root of the right side: 11.401754251

Break this problem into two subproblems by setting 
(p + 9) equal to 11.401754251 and -11.401754251.

Subproblem 1

p + 9 = 11.401754251 Simplifying p + 9 = 11.401754251 Reorder the terms: 9 + p = 11.401754251 Solving 9 + p = 11.401754251 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + p = 11.401754251 + -9 Combine like terms: 9 + -9 = 0 0 + p = 11.401754251 + -9 p = 11.401754251 + -9 Combine like terms: 11.401754251 + -9 = 2.401754251 p = 2.401754251 Simplifying p = 2.401754251

Subproblem 2

p + 9 = -11.401754251 Simplifying p + 9 = -11.401754251 Reorder the terms: 9 + p = -11.401754251 Solving 9 + p = -11.401754251 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-9' to each side of the equation. 9 + -9 + p = -11.401754251 + -9 Combine like terms: 9 + -9 = 0 0 + p = -11.401754251 + -9 p = -11.401754251 + -9 Combine like terms: -11.401754251 + -9 = -20.401754251 p = -20.401754251 Simplifying p = -20.401754251

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.401754251, -20.401754251}

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