10p^2-4p-5=0

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Solution for 10p^2-4p-5=0 equation:


Simplifying
10p2 + -4p + -5 = 0

Reorder the terms:
-5 + -4p + 10p2 = 0

Solving
-5 + -4p + 10p2 = 0

Solving for variable 'p'.

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

Divide each side by '10'.
-0.5 + -0.4p + p2 = 0

Move the constant term to the right:

Add '0.5' to each side of the equation.
-0.5 + -0.4p + 0.5 + p2 = 0 + 0.5

Reorder the terms:
-0.5 + 0.5 + -0.4p + p2 = 0 + 0.5

Combine like terms: -0.5 + 0.5 = 0.0
0.0 + -0.4p + p2 = 0 + 0.5
-0.4p + p2 = 0 + 0.5

Combine like terms: 0 + 0.5 = 0.5
-0.4p + p2 = 0.5

The p term is -0.4p.  Take half its coefficient (-0.2).
Square it (0.04) and add it to both sides.

Add '0.04' to each side of the equation.
-0.4p + 0.04 + p2 = 0.5 + 0.04

Reorder the terms:
0.04 + -0.4p + p2 = 0.5 + 0.04

Combine like terms: 0.5 + 0.04 = 0.54
0.04 + -0.4p + p2 = 0.54

Factor a perfect square on the left side:
(p + -0.2)(p + -0.2) = 0.54

Calculate the square root of the right side: 0.734846923

Break this problem into two subproblems by setting 
(p + -0.2) equal to 0.734846923 and -0.734846923.

Subproblem 1

p + -0.2 = 0.734846923 Simplifying p + -0.2 = 0.734846923 Reorder the terms: -0.2 + p = 0.734846923 Solving -0.2 + p = 0.734846923 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + p = 0.734846923 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + p = 0.734846923 + 0.2 p = 0.734846923 + 0.2 Combine like terms: 0.734846923 + 0.2 = 0.934846923 p = 0.934846923 Simplifying p = 0.934846923

Subproblem 2

p + -0.2 = -0.734846923 Simplifying p + -0.2 = -0.734846923 Reorder the terms: -0.2 + p = -0.734846923 Solving -0.2 + p = -0.734846923 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '0.2' to each side of the equation. -0.2 + 0.2 + p = -0.734846923 + 0.2 Combine like terms: -0.2 + 0.2 = 0.0 0.0 + p = -0.734846923 + 0.2 p = -0.734846923 + 0.2 Combine like terms: -0.734846923 + 0.2 = -0.534846923 p = -0.534846923 Simplifying p = -0.534846923

Solution

The solution to the problem is based on the solutions from the subproblems. p = {0.934846923, -0.534846923}

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