0=3p^2+5p-1

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Solution for 0=3p^2+5p-1 equation:


Simplifying
0 = 3p2 + 5p + -1

Reorder the terms:
0 = -1 + 5p + 3p2

Solving
0 = -1 + 5p + 3p2

Solving for variable 'p'.

Combine like terms: 0 + 1 = 1
1 + -5p + -3p2 = -1 + 5p + 3p2 + 1 + -5p + -3p2

Reorder the terms:
1 + -5p + -3p2 = -1 + 1 + 5p + -5p + 3p2 + -3p2

Combine like terms: -1 + 1 = 0
1 + -5p + -3p2 = 0 + 5p + -5p + 3p2 + -3p2
1 + -5p + -3p2 = 5p + -5p + 3p2 + -3p2

Combine like terms: 5p + -5p = 0
1 + -5p + -3p2 = 0 + 3p2 + -3p2
1 + -5p + -3p2 = 3p2 + -3p2

Combine like terms: 3p2 + -3p2 = 0
1 + -5p + -3p2 = 0

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

Divide each side by '-3'.
-0.3333333333 + 1.666666667p + p2 = 0

Move the constant term to the right:

Add '0.3333333333' to each side of the equation.
-0.3333333333 + 1.666666667p + 0.3333333333 + p2 = 0 + 0.3333333333

Reorder the terms:
-0.3333333333 + 0.3333333333 + 1.666666667p + p2 = 0 + 0.3333333333

Combine like terms: -0.3333333333 + 0.3333333333 = 0.0000000000
0.0000000000 + 1.666666667p + p2 = 0 + 0.3333333333
1.666666667p + p2 = 0 + 0.3333333333

Combine like terms: 0 + 0.3333333333 = 0.3333333333
1.666666667p + p2 = 0.3333333333

The p term is 1.666666667p.  Take half its coefficient (0.8333333335).
Square it (0.6944444447) and add it to both sides.

Add '0.6944444447' to each side of the equation.
1.666666667p + 0.6944444447 + p2 = 0.3333333333 + 0.6944444447

Reorder the terms:
0.6944444447 + 1.666666667p + p2 = 0.3333333333 + 0.6944444447

Combine like terms: 0.3333333333 + 0.6944444447 = 1.027777778
0.6944444447 + 1.666666667p + p2 = 1.027777778

Factor a perfect square on the left side:
(p + 0.8333333335)(p + 0.8333333335) = 1.027777778

Calculate the square root of the right side: 1.013793755

Break this problem into two subproblems by setting 
(p + 0.8333333335) equal to 1.013793755 and -1.013793755.

Subproblem 1

p + 0.8333333335 = 1.013793755 Simplifying p + 0.8333333335 = 1.013793755 Reorder the terms: 0.8333333335 + p = 1.013793755 Solving 0.8333333335 + p = 1.013793755 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + p = 1.013793755 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + p = 1.013793755 + -0.8333333335 p = 1.013793755 + -0.8333333335 Combine like terms: 1.013793755 + -0.8333333335 = 0.1804604215 p = 0.1804604215 Simplifying p = 0.1804604215

Subproblem 2

p + 0.8333333335 = -1.013793755 Simplifying p + 0.8333333335 = -1.013793755 Reorder the terms: 0.8333333335 + p = -1.013793755 Solving 0.8333333335 + p = -1.013793755 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.8333333335' to each side of the equation. 0.8333333335 + -0.8333333335 + p = -1.013793755 + -0.8333333335 Combine like terms: 0.8333333335 + -0.8333333335 = 0.0000000000 0.0000000000 + p = -1.013793755 + -0.8333333335 p = -1.013793755 + -0.8333333335 Combine like terms: -1.013793755 + -0.8333333335 = -1.8471270885 p = -1.8471270885 Simplifying p = -1.8471270885

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.1804604215, -1.8471270885}

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