0=2p^2-4p-135

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Solution for 0=2p^2-4p-135 equation:


Simplifying
0 = 2p2 + -4p + -135

Reorder the terms:
0 = -135 + -4p + 2p2

Solving
0 = -135 + -4p + 2p2

Solving for variable 'p'.

Combine like terms: 0 + 135 = 135
135 + 4p + -2p2 = -135 + -4p + 2p2 + 135 + 4p + -2p2

Reorder the terms:
135 + 4p + -2p2 = -135 + 135 + -4p + 4p + 2p2 + -2p2

Combine like terms: -135 + 135 = 0
135 + 4p + -2p2 = 0 + -4p + 4p + 2p2 + -2p2
135 + 4p + -2p2 = -4p + 4p + 2p2 + -2p2

Combine like terms: -4p + 4p = 0
135 + 4p + -2p2 = 0 + 2p2 + -2p2
135 + 4p + -2p2 = 2p2 + -2p2

Combine like terms: 2p2 + -2p2 = 0
135 + 4p + -2p2 = 0

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

Divide each side by '-2'.
-67.5 + -2p + p2 = 0

Move the constant term to the right:

Add '67.5' to each side of the equation.
-67.5 + -2p + 67.5 + p2 = 0 + 67.5

Reorder the terms:
-67.5 + 67.5 + -2p + p2 = 0 + 67.5

Combine like terms: -67.5 + 67.5 = 0.0
0.0 + -2p + p2 = 0 + 67.5
-2p + p2 = 0 + 67.5

Combine like terms: 0 + 67.5 = 67.5
-2p + p2 = 67.5

The p term is -2p.  Take half its coefficient (-1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
-2p + 1 + p2 = 67.5 + 1

Reorder the terms:
1 + -2p + p2 = 67.5 + 1

Combine like terms: 67.5 + 1 = 68.5
1 + -2p + p2 = 68.5

Factor a perfect square on the left side:
(p + -1)(p + -1) = 68.5

Calculate the square root of the right side: 8.276472679

Break this problem into two subproblems by setting 
(p + -1) equal to 8.276472679 and -8.276472679.

Subproblem 1

p + -1 = 8.276472679 Simplifying p + -1 = 8.276472679 Reorder the terms: -1 + p = 8.276472679 Solving -1 + p = 8.276472679 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + p = 8.276472679 + 1 Combine like terms: -1 + 1 = 0 0 + p = 8.276472679 + 1 p = 8.276472679 + 1 Combine like terms: 8.276472679 + 1 = 9.276472679 p = 9.276472679 Simplifying p = 9.276472679

Subproblem 2

p + -1 = -8.276472679 Simplifying p + -1 = -8.276472679 Reorder the terms: -1 + p = -8.276472679 Solving -1 + p = -8.276472679 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1' to each side of the equation. -1 + 1 + p = -8.276472679 + 1 Combine like terms: -1 + 1 = 0 0 + p = -8.276472679 + 1 p = -8.276472679 + 1 Combine like terms: -8.276472679 + 1 = -7.276472679 p = -7.276472679 Simplifying p = -7.276472679

Solution

The solution to the problem is based on the solutions from the subproblems. p = {9.276472679, -7.276472679}

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