9p^2+5p-5=0

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Solution for 9p^2+5p-5=0 equation:


Simplifying
9p2 + 5p + -5 = 0

Reorder the terms:
-5 + 5p + 9p2 = 0

Solving
-5 + 5p + 9p2 = 0

Solving for variable 'p'.

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

Divide each side by '9'.
-0.5555555556 + 0.5555555556p + p2 = 0

Move the constant term to the right:

Add '0.5555555556' to each side of the equation.
-0.5555555556 + 0.5555555556p + 0.5555555556 + p2 = 0 + 0.5555555556

Reorder the terms:
-0.5555555556 + 0.5555555556 + 0.5555555556p + p2 = 0 + 0.5555555556

Combine like terms: -0.5555555556 + 0.5555555556 = 0.0000000000
0.0000000000 + 0.5555555556p + p2 = 0 + 0.5555555556
0.5555555556p + p2 = 0 + 0.5555555556

Combine like terms: 0 + 0.5555555556 = 0.5555555556
0.5555555556p + p2 = 0.5555555556

The p term is 0.5555555556p.  Take half its coefficient (0.2777777778).
Square it (0.07716049384) and add it to both sides.

Add '0.07716049384' to each side of the equation.
0.5555555556p + 0.07716049384 + p2 = 0.5555555556 + 0.07716049384

Reorder the terms:
0.07716049384 + 0.5555555556p + p2 = 0.5555555556 + 0.07716049384

Combine like terms: 0.5555555556 + 0.07716049384 = 0.63271604944
0.07716049384 + 0.5555555556p + p2 = 0.63271604944

Factor a perfect square on the left side:
(p + 0.2777777778)(p + 0.2777777778) = 0.63271604944

Calculate the square root of the right side: 0.795434504

Break this problem into two subproblems by setting 
(p + 0.2777777778) equal to 0.795434504 and -0.795434504.

Subproblem 1

p + 0.2777777778 = 0.795434504 Simplifying p + 0.2777777778 = 0.795434504 Reorder the terms: 0.2777777778 + p = 0.795434504 Solving 0.2777777778 + p = 0.795434504 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + p = 0.795434504 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + p = 0.795434504 + -0.2777777778 p = 0.795434504 + -0.2777777778 Combine like terms: 0.795434504 + -0.2777777778 = 0.5176567262 p = 0.5176567262 Simplifying p = 0.5176567262

Subproblem 2

p + 0.2777777778 = -0.795434504 Simplifying p + 0.2777777778 = -0.795434504 Reorder the terms: 0.2777777778 + p = -0.795434504 Solving 0.2777777778 + p = -0.795434504 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.2777777778' to each side of the equation. 0.2777777778 + -0.2777777778 + p = -0.795434504 + -0.2777777778 Combine like terms: 0.2777777778 + -0.2777777778 = 0.0000000000 0.0000000000 + p = -0.795434504 + -0.2777777778 p = -0.795434504 + -0.2777777778 Combine like terms: -0.795434504 + -0.2777777778 = -1.0732122818 p = -1.0732122818 Simplifying p = -1.0732122818

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.5176567262, -1.0732122818}

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