2p^2-18p-11=0

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Solution for 2p^2-18p-11=0 equation:


Simplifying
2p2 + -18p + -11 = 0

Reorder the terms:
-11 + -18p + 2p2 = 0

Solving
-11 + -18p + 2p2 = 0

Solving for variable 'p'.

Begin completing the square.  Divide all terms by
2 the coefficient of the squared term: 

Divide each side by '2'.
-5.5 + -9p + p2 = 0

Move the constant term to the right:

Add '5.5' to each side of the equation.
-5.5 + -9p + 5.5 + p2 = 0 + 5.5

Reorder the terms:
-5.5 + 5.5 + -9p + p2 = 0 + 5.5

Combine like terms: -5.5 + 5.5 = 0.0
0.0 + -9p + p2 = 0 + 5.5
-9p + p2 = 0 + 5.5

Combine like terms: 0 + 5.5 = 5.5
-9p + p2 = 5.5

The p term is -9p.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9p + 20.25 + p2 = 5.5 + 20.25

Reorder the terms:
20.25 + -9p + p2 = 5.5 + 20.25

Combine like terms: 5.5 + 20.25 = 25.75
20.25 + -9p + p2 = 25.75

Factor a perfect square on the left side:
(p + -4.5)(p + -4.5) = 25.75

Calculate the square root of the right side: 5.074445783

Break this problem into two subproblems by setting 
(p + -4.5) equal to 5.074445783 and -5.074445783.

Subproblem 1

p + -4.5 = 5.074445783 Simplifying p + -4.5 = 5.074445783 Reorder the terms: -4.5 + p = 5.074445783 Solving -4.5 + p = 5.074445783 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + p = 5.074445783 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + p = 5.074445783 + 4.5 p = 5.074445783 + 4.5 Combine like terms: 5.074445783 + 4.5 = 9.574445783 p = 9.574445783 Simplifying p = 9.574445783

Subproblem 2

p + -4.5 = -5.074445783 Simplifying p + -4.5 = -5.074445783 Reorder the terms: -4.5 + p = -5.074445783 Solving -4.5 + p = -5.074445783 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + p = -5.074445783 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + p = -5.074445783 + 4.5 p = -5.074445783 + 4.5 Combine like terms: -5.074445783 + 4.5 = -0.574445783 p = -0.574445783 Simplifying p = -0.574445783

Solution

The solution to the problem is based on the solutions from the subproblems. p = {9.574445783, -0.574445783}

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