3p^2+12p-25=0

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Solution for 3p^2+12p-25=0 equation:


Simplifying
3p2 + 12p + -25 = 0

Reorder the terms:
-25 + 12p + 3p2 = 0

Solving
-25 + 12p + 3p2 = 0

Solving for variable 'p'.

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

Divide each side by '3'.
-8.333333333 + 4p + p2 = 0

Move the constant term to the right:

Add '8.333333333' to each side of the equation.
-8.333333333 + 4p + 8.333333333 + p2 = 0 + 8.333333333

Reorder the terms:
-8.333333333 + 8.333333333 + 4p + p2 = 0 + 8.333333333

Combine like terms: -8.333333333 + 8.333333333 = 0.000000000
0.000000000 + 4p + p2 = 0 + 8.333333333
4p + p2 = 0 + 8.333333333

Combine like terms: 0 + 8.333333333 = 8.333333333
4p + p2 = 8.333333333

The p term is 4p.  Take half its coefficient (2).
Square it (4) and add it to both sides.

Add '4' to each side of the equation.
4p + 4 + p2 = 8.333333333 + 4

Reorder the terms:
4 + 4p + p2 = 8.333333333 + 4

Combine like terms: 8.333333333 + 4 = 12.333333333
4 + 4p + p2 = 12.333333333

Factor a perfect square on the left side:
(p + 2)(p + 2) = 12.333333333

Calculate the square root of the right side: 3.511884584

Break this problem into two subproblems by setting 
(p + 2) equal to 3.511884584 and -3.511884584.

Subproblem 1

p + 2 = 3.511884584 Simplifying p + 2 = 3.511884584 Reorder the terms: 2 + p = 3.511884584 Solving 2 + p = 3.511884584 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = 3.511884584 + -2 Combine like terms: 2 + -2 = 0 0 + p = 3.511884584 + -2 p = 3.511884584 + -2 Combine like terms: 3.511884584 + -2 = 1.511884584 p = 1.511884584 Simplifying p = 1.511884584

Subproblem 2

p + 2 = -3.511884584 Simplifying p + 2 = -3.511884584 Reorder the terms: 2 + p = -3.511884584 Solving 2 + p = -3.511884584 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-2' to each side of the equation. 2 + -2 + p = -3.511884584 + -2 Combine like terms: 2 + -2 = 0 0 + p = -3.511884584 + -2 p = -3.511884584 + -2 Combine like terms: -3.511884584 + -2 = -5.511884584 p = -5.511884584 Simplifying p = -5.511884584

Solution

The solution to the problem is based on the solutions from the subproblems. p = {1.511884584, -5.511884584}

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