p^2-18p-3=0

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Solution for p^2-18p-3=0 equation:


Simplifying
p2 + -18p + -3 = 0

Reorder the terms:
-3 + -18p + p2 = 0

Solving
-3 + -18p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + -18p + 3 + p2 = 0 + 3

Reorder the terms:
-3 + 3 + -18p + p2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + -18p + p2 = 0 + 3
-18p + p2 = 0 + 3

Combine like terms: 0 + 3 = 3
-18p + p2 = 3

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 = 3 + 81

Reorder the terms:
81 + -18p + p2 = 3 + 81

Combine like terms: 3 + 81 = 84
81 + -18p + p2 = 84

Factor a perfect square on the left side:
(p + -9)(p + -9) = 84

Calculate the square root of the right side: 9.16515139

Break this problem into two subproblems by setting 
(p + -9) equal to 9.16515139 and -9.16515139.

Subproblem 1

p + -9 = 9.16515139 Simplifying p + -9 = 9.16515139 Reorder the terms: -9 + p = 9.16515139 Solving -9 + p = 9.16515139 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 = 9.16515139 + 9 Combine like terms: -9 + 9 = 0 0 + p = 9.16515139 + 9 p = 9.16515139 + 9 Combine like terms: 9.16515139 + 9 = 18.16515139 p = 18.16515139 Simplifying p = 18.16515139

Subproblem 2

p + -9 = -9.16515139 Simplifying p + -9 = -9.16515139 Reorder the terms: -9 + p = -9.16515139 Solving -9 + p = -9.16515139 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 = -9.16515139 + 9 Combine like terms: -9 + 9 = 0 0 + p = -9.16515139 + 9 p = -9.16515139 + 9 Combine like terms: -9.16515139 + 9 = -0.16515139 p = -0.16515139 Simplifying p = -0.16515139

Solution

The solution to the problem is based on the solutions from the subproblems. p = {18.16515139, -0.16515139}

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