8p^2+22p-9=0

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Solution for 8p^2+22p-9=0 equation:


Simplifying
8p2 + 22p + -9 = 0

Reorder the terms:
-9 + 22p + 8p2 = 0

Solving
-9 + 22p + 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'.
-1.125 + 2.75p + p2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + 2.75p + 1.125 + p2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + 2.75p + p2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + 2.75p + p2 = 0 + 1.125
2.75p + p2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
2.75p + p2 = 1.125

The p term is 2.75p.  Take half its coefficient (1.375).
Square it (1.890625) and add it to both sides.

Add '1.890625' to each side of the equation.
2.75p + 1.890625 + p2 = 1.125 + 1.890625

Reorder the terms:
1.890625 + 2.75p + p2 = 1.125 + 1.890625

Combine like terms: 1.125 + 1.890625 = 3.015625
1.890625 + 2.75p + p2 = 3.015625

Factor a perfect square on the left side:
(p + 1.375)(p + 1.375) = 3.015625

Calculate the square root of the right side: 1.736555499

Break this problem into two subproblems by setting 
(p + 1.375) equal to 1.736555499 and -1.736555499.

Subproblem 1

p + 1.375 = 1.736555499 Simplifying p + 1.375 = 1.736555499 Reorder the terms: 1.375 + p = 1.736555499 Solving 1.375 + p = 1.736555499 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + p = 1.736555499 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + p = 1.736555499 + -1.375 p = 1.736555499 + -1.375 Combine like terms: 1.736555499 + -1.375 = 0.361555499 p = 0.361555499 Simplifying p = 0.361555499

Subproblem 2

p + 1.375 = -1.736555499 Simplifying p + 1.375 = -1.736555499 Reorder the terms: 1.375 + p = -1.736555499 Solving 1.375 + p = -1.736555499 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1.375' to each side of the equation. 1.375 + -1.375 + p = -1.736555499 + -1.375 Combine like terms: 1.375 + -1.375 = 0.000 0.000 + p = -1.736555499 + -1.375 p = -1.736555499 + -1.375 Combine like terms: -1.736555499 + -1.375 = -3.111555499 p = -3.111555499 Simplifying p = -3.111555499

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.361555499, -3.111555499}

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