3p^2-9=-11p

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Solution for 3p^2-9=-11p equation:


Simplifying
3p2 + -9 = -11p

Reorder the terms:
-9 + 3p2 = -11p

Solving
-9 + 3p2 = -11p

Solving for variable 'p'.

Reorder the terms:
-9 + 11p + 3p2 = -11p + 11p

Combine like terms: -11p + 11p = 0
-9 + 11p + 3p2 = 0

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

Divide each side by '3'.
-3 + 3.666666667p + p2 = 0

Move the constant term to the right:

Add '3' to each side of the equation.
-3 + 3.666666667p + 3 + p2 = 0 + 3

Reorder the terms:
-3 + 3 + 3.666666667p + p2 = 0 + 3

Combine like terms: -3 + 3 = 0
0 + 3.666666667p + p2 = 0 + 3
3.666666667p + p2 = 0 + 3

Combine like terms: 0 + 3 = 3
3.666666667p + p2 = 3

The p term is 3.666666667p.  Take half its coefficient (1.833333334).
Square it (3.361111114) and add it to both sides.

Add '3.361111114' to each side of the equation.
3.666666667p + 3.361111114 + p2 = 3 + 3.361111114

Reorder the terms:
3.361111114 + 3.666666667p + p2 = 3 + 3.361111114

Combine like terms: 3 + 3.361111114 = 6.361111114
3.361111114 + 3.666666667p + p2 = 6.361111114

Factor a perfect square on the left side:
(p + 1.833333334)(p + 1.833333334) = 6.361111114

Calculate the square root of the right side: 2.522124326

Break this problem into two subproblems by setting 
(p + 1.833333334) equal to 2.522124326 and -2.522124326.

Subproblem 1

p + 1.833333334 = 2.522124326 Simplifying p + 1.833333334 = 2.522124326 Reorder the terms: 1.833333334 + p = 2.522124326 Solving 1.833333334 + p = 2.522124326 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + p = 2.522124326 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + p = 2.522124326 + -1.833333334 p = 2.522124326 + -1.833333334 Combine like terms: 2.522124326 + -1.833333334 = 0.688790992 p = 0.688790992 Simplifying p = 0.688790992

Subproblem 2

p + 1.833333334 = -2.522124326 Simplifying p + 1.833333334 = -2.522124326 Reorder the terms: 1.833333334 + p = -2.522124326 Solving 1.833333334 + p = -2.522124326 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1.833333334' to each side of the equation. 1.833333334 + -1.833333334 + p = -2.522124326 + -1.833333334 Combine like terms: 1.833333334 + -1.833333334 = 0.000000000 0.000000000 + p = -2.522124326 + -1.833333334 p = -2.522124326 + -1.833333334 Combine like terms: -2.522124326 + -1.833333334 = -4.35545766 p = -4.35545766 Simplifying p = -4.35545766

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.688790992, -4.35545766}

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