2p^2-20p+13=0

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Solution for 2p^2-20p+13=0 equation:


Simplifying
2p2 + -20p + 13 = 0

Reorder the terms:
13 + -20p + 2p2 = 0

Solving
13 + -20p + 2p2 = 0

Solving for variable 'p'.

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

Divide each side by '2'.
6.5 + -10p + p2 = 0

Move the constant term to the right:

Add '-6.5' to each side of the equation.
6.5 + -10p + -6.5 + p2 = 0 + -6.5

Reorder the terms:
6.5 + -6.5 + -10p + p2 = 0 + -6.5

Combine like terms: 6.5 + -6.5 = 0.0
0.0 + -10p + p2 = 0 + -6.5
-10p + p2 = 0 + -6.5

Combine like terms: 0 + -6.5 = -6.5
-10p + p2 = -6.5

The p term is -10p.  Take half its coefficient (-5).
Square it (25) and add it to both sides.

Add '25' to each side of the equation.
-10p + 25 + p2 = -6.5 + 25

Reorder the terms:
25 + -10p + p2 = -6.5 + 25

Combine like terms: -6.5 + 25 = 18.5
25 + -10p + p2 = 18.5

Factor a perfect square on the left side:
(p + -5)(p + -5) = 18.5

Calculate the square root of the right side: 4.301162634

Break this problem into two subproblems by setting 
(p + -5) equal to 4.301162634 and -4.301162634.

Subproblem 1

p + -5 = 4.301162634 Simplifying p + -5 = 4.301162634 Reorder the terms: -5 + p = 4.301162634 Solving -5 + p = 4.301162634 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + p = 4.301162634 + 5 Combine like terms: -5 + 5 = 0 0 + p = 4.301162634 + 5 p = 4.301162634 + 5 Combine like terms: 4.301162634 + 5 = 9.301162634 p = 9.301162634 Simplifying p = 9.301162634

Subproblem 2

p + -5 = -4.301162634 Simplifying p + -5 = -4.301162634 Reorder the terms: -5 + p = -4.301162634 Solving -5 + p = -4.301162634 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '5' to each side of the equation. -5 + 5 + p = -4.301162634 + 5 Combine like terms: -5 + 5 = 0 0 + p = -4.301162634 + 5 p = -4.301162634 + 5 Combine like terms: -4.301162634 + 5 = 0.698837366 p = 0.698837366 Simplifying p = 0.698837366

Solution

The solution to the problem is based on the solutions from the subproblems. p = {9.301162634, 0.698837366}

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