8p^2-9=11p

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Solution for 8p^2-9=11p equation:


Simplifying
8p2 + -9 = 11p

Reorder the terms:
-9 + 8p2 = 11p

Solving
-9 + 8p2 = 11p

Solving for variable 'p'.

Reorder the terms:
-9 + -11p + 8p2 = 11p + -11p

Combine like terms: 11p + -11p = 0
-9 + -11p + 8p2 = 0

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

Divide each side by '8'.
-1.125 + -1.375p + p2 = 0

Move the constant term to the right:

Add '1.125' to each side of the equation.
-1.125 + -1.375p + 1.125 + p2 = 0 + 1.125

Reorder the terms:
-1.125 + 1.125 + -1.375p + p2 = 0 + 1.125

Combine like terms: -1.125 + 1.125 = 0.000
0.000 + -1.375p + p2 = 0 + 1.125
-1.375p + p2 = 0 + 1.125

Combine like terms: 0 + 1.125 = 1.125
-1.375p + p2 = 1.125

The p term is -1.375p.  Take half its coefficient (-0.6875).
Square it (0.47265625) and add it to both sides.

Add '0.47265625' to each side of the equation.
-1.375p + 0.47265625 + p2 = 1.125 + 0.47265625

Reorder the terms:
0.47265625 + -1.375p + p2 = 1.125 + 0.47265625

Combine like terms: 1.125 + 0.47265625 = 1.59765625
0.47265625 + -1.375p + p2 = 1.59765625

Factor a perfect square on the left side:
(p + -0.6875)(p + -0.6875) = 1.59765625

Calculate the square root of the right side: 1.263984276

Break this problem into two subproblems by setting 
(p + -0.6875) equal to 1.263984276 and -1.263984276.

Subproblem 1

p + -0.6875 = 1.263984276 Simplifying p + -0.6875 = 1.263984276 Reorder the terms: -0.6875 + p = 1.263984276 Solving -0.6875 + p = 1.263984276 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + p = 1.263984276 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + p = 1.263984276 + 0.6875 p = 1.263984276 + 0.6875 Combine like terms: 1.263984276 + 0.6875 = 1.951484276 p = 1.951484276 Simplifying p = 1.951484276

Subproblem 2

p + -0.6875 = -1.263984276 Simplifying p + -0.6875 = -1.263984276 Reorder the terms: -0.6875 + p = -1.263984276 Solving -0.6875 + p = -1.263984276 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.6875' to each side of the equation. -0.6875 + 0.6875 + p = -1.263984276 + 0.6875 Combine like terms: -0.6875 + 0.6875 = 0.0000 0.0000 + p = -1.263984276 + 0.6875 p = -1.263984276 + 0.6875 Combine like terms: -1.263984276 + 0.6875 = -0.576484276 p = -0.576484276 Simplifying p = -0.576484276

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.951484276, -0.576484276}

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