0=5p^2-12p-16

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Solution for 0=5p^2-12p-16 equation:


Simplifying
0 = 5p2 + -12p + -16

Reorder the terms:
0 = -16 + -12p + 5p2

Solving
0 = -16 + -12p + 5p2

Solving for variable 'p'.

Combine like terms: 0 + 16 = 16
16 + 12p + -5p2 = -16 + -12p + 5p2 + 16 + 12p + -5p2

Reorder the terms:
16 + 12p + -5p2 = -16 + 16 + -12p + 12p + 5p2 + -5p2

Combine like terms: -16 + 16 = 0
16 + 12p + -5p2 = 0 + -12p + 12p + 5p2 + -5p2
16 + 12p + -5p2 = -12p + 12p + 5p2 + -5p2

Combine like terms: -12p + 12p = 0
16 + 12p + -5p2 = 0 + 5p2 + -5p2
16 + 12p + -5p2 = 5p2 + -5p2

Combine like terms: 5p2 + -5p2 = 0
16 + 12p + -5p2 = 0

Begin completing the square.  Divide all terms by
-5 the coefficient of the squared term: 

Divide each side by '-5'.
-3.2 + -2.4p + p2 = 0

Move the constant term to the right:

Add '3.2' to each side of the equation.
-3.2 + -2.4p + 3.2 + p2 = 0 + 3.2

Reorder the terms:
-3.2 + 3.2 + -2.4p + p2 = 0 + 3.2

Combine like terms: -3.2 + 3.2 = 0.0
0.0 + -2.4p + p2 = 0 + 3.2
-2.4p + p2 = 0 + 3.2

Combine like terms: 0 + 3.2 = 3.2
-2.4p + p2 = 3.2

The p term is -2.4p.  Take half its coefficient (-1.2).
Square it (1.44) and add it to both sides.

Add '1.44' to each side of the equation.
-2.4p + 1.44 + p2 = 3.2 + 1.44

Reorder the terms:
1.44 + -2.4p + p2 = 3.2 + 1.44

Combine like terms: 3.2 + 1.44 = 4.64
1.44 + -2.4p + p2 = 4.64

Factor a perfect square on the left side:
(p + -1.2)(p + -1.2) = 4.64

Calculate the square root of the right side: 2.154065923

Break this problem into two subproblems by setting 
(p + -1.2) equal to 2.154065923 and -2.154065923.

Subproblem 1

p + -1.2 = 2.154065923 Simplifying p + -1.2 = 2.154065923 Reorder the terms: -1.2 + p = 2.154065923 Solving -1.2 + p = 2.154065923 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + p = 2.154065923 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + p = 2.154065923 + 1.2 p = 2.154065923 + 1.2 Combine like terms: 2.154065923 + 1.2 = 3.354065923 p = 3.354065923 Simplifying p = 3.354065923

Subproblem 2

p + -1.2 = -2.154065923 Simplifying p + -1.2 = -2.154065923 Reorder the terms: -1.2 + p = -2.154065923 Solving -1.2 + p = -2.154065923 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.2' to each side of the equation. -1.2 + 1.2 + p = -2.154065923 + 1.2 Combine like terms: -1.2 + 1.2 = 0.0 0.0 + p = -2.154065923 + 1.2 p = -2.154065923 + 1.2 Combine like terms: -2.154065923 + 1.2 = -0.954065923 p = -0.954065923 Simplifying p = -0.954065923

Solution

The solution to the problem is based on the solutions from the subproblems. p = {3.354065923, -0.954065923}

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