3p^2-15p-9=0

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Solution for 3p^2-15p-9=0 equation:


Simplifying
3p2 + -15p + -9 = 0

Reorder the terms:
-9 + -15p + 3p2 = 0

Solving
-9 + -15p + 3p2 = 0

Solving for variable 'p'.

Factor out the Greatest Common Factor (GCF), '3'.
3(-3 + -5p + p2) = 0

Ignore the factor 3.

Subproblem 1

Set the factor '(-3 + -5p + p2)' equal to zero and attempt to solve: Simplifying -3 + -5p + p2 = 0 Solving -3 + -5p + p2 = 0 Begin completing the square. Move the constant term to the right: Add '3' to each side of the equation. -3 + -5p + 3 + p2 = 0 + 3 Reorder the terms: -3 + 3 + -5p + p2 = 0 + 3 Combine like terms: -3 + 3 = 0 0 + -5p + p2 = 0 + 3 -5p + p2 = 0 + 3 Combine like terms: 0 + 3 = 3 -5p + p2 = 3 The p term is -5p. Take half its coefficient (-2.5). Square it (6.25) and add it to both sides. Add '6.25' to each side of the equation. -5p + 6.25 + p2 = 3 + 6.25 Reorder the terms: 6.25 + -5p + p2 = 3 + 6.25 Combine like terms: 3 + 6.25 = 9.25 6.25 + -5p + p2 = 9.25 Factor a perfect square on the left side: (p + -2.5)(p + -2.5) = 9.25 Calculate the square root of the right side: 3.041381265 Break this problem into two subproblems by setting (p + -2.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

p + -2.5 = 3.041381265 Simplifying p + -2.5 = 3.041381265 Reorder the terms: -2.5 + p = 3.041381265 Solving -2.5 + p = 3.041381265 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + p = 3.041381265 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + p = 3.041381265 + 2.5 p = 3.041381265 + 2.5 Combine like terms: 3.041381265 + 2.5 = 5.541381265 p = 5.541381265 Simplifying p = 5.541381265

Subproblem 2

p + -2.5 = -3.041381265 Simplifying p + -2.5 = -3.041381265 Reorder the terms: -2.5 + p = -3.041381265 Solving -2.5 + p = -3.041381265 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '2.5' to each side of the equation. -2.5 + 2.5 + p = -3.041381265 + 2.5 Combine like terms: -2.5 + 2.5 = 0.0 0.0 + p = -3.041381265 + 2.5 p = -3.041381265 + 2.5 Combine like terms: -3.041381265 + 2.5 = -0.541381265 p = -0.541381265 Simplifying p = -0.541381265

Solution

The solution to the problem is based on the solutions from the subproblems. p = {5.541381265, -0.541381265}

Solution

p = {5.541381265, -0.541381265}

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