8p^2-19p-12=0

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Solution for 8p^2-19p-12=0 equation:


Simplifying
8p2 + -19p + -12 = 0

Reorder the terms:
-12 + -19p + 8p2 = 0

Solving
-12 + -19p + 8p2 = 0

Solving for variable 'p'.

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

Divide each side by '8'.
-1.5 + -2.375p + p2 = 0

Move the constant term to the right:

Add '1.5' to each side of the equation.
-1.5 + -2.375p + 1.5 + p2 = 0 + 1.5

Reorder the terms:
-1.5 + 1.5 + -2.375p + p2 = 0 + 1.5

Combine like terms: -1.5 + 1.5 = 0.0
0.0 + -2.375p + p2 = 0 + 1.5
-2.375p + p2 = 0 + 1.5

Combine like terms: 0 + 1.5 = 1.5
-2.375p + p2 = 1.5

The p term is -2.375p.  Take half its coefficient (-1.1875).
Square it (1.41015625) and add it to both sides.

Add '1.41015625' to each side of the equation.
-2.375p + 1.41015625 + p2 = 1.5 + 1.41015625

Reorder the terms:
1.41015625 + -2.375p + p2 = 1.5 + 1.41015625

Combine like terms: 1.5 + 1.41015625 = 2.91015625
1.41015625 + -2.375p + p2 = 2.91015625

Factor a perfect square on the left side:
(p + -1.1875)(p + -1.1875) = 2.91015625

Calculate the square root of the right side: 1.705918008

Break this problem into two subproblems by setting 
(p + -1.1875) equal to 1.705918008 and -1.705918008.

Subproblem 1

p + -1.1875 = 1.705918008 Simplifying p + -1.1875 = 1.705918008 Reorder the terms: -1.1875 + p = 1.705918008 Solving -1.1875 + p = 1.705918008 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.1875' to each side of the equation. -1.1875 + 1.1875 + p = 1.705918008 + 1.1875 Combine like terms: -1.1875 + 1.1875 = 0.0000 0.0000 + p = 1.705918008 + 1.1875 p = 1.705918008 + 1.1875 Combine like terms: 1.705918008 + 1.1875 = 2.893418008 p = 2.893418008 Simplifying p = 2.893418008

Subproblem 2

p + -1.1875 = -1.705918008 Simplifying p + -1.1875 = -1.705918008 Reorder the terms: -1.1875 + p = -1.705918008 Solving -1.1875 + p = -1.705918008 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '1.1875' to each side of the equation. -1.1875 + 1.1875 + p = -1.705918008 + 1.1875 Combine like terms: -1.1875 + 1.1875 = 0.0000 0.0000 + p = -1.705918008 + 1.1875 p = -1.705918008 + 1.1875 Combine like terms: -1.705918008 + 1.1875 = -0.518418008 p = -0.518418008 Simplifying p = -0.518418008

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.893418008, -0.518418008}

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