5p^2-20p+1=0

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Solution for 5p^2-20p+1=0 equation:


Simplifying
5p2 + -20p + 1 = 0

Reorder the terms:
1 + -20p + 5p2 = 0

Solving
1 + -20p + 5p2 = 0

Solving for variable 'p'.

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

Divide each side by '5'.
0.2 + -4p + p2 = 0

Move the constant term to the right:

Add '-0.2' to each side of the equation.
0.2 + -4p + -0.2 + p2 = 0 + -0.2

Reorder the terms:
0.2 + -0.2 + -4p + p2 = 0 + -0.2

Combine like terms: 0.2 + -0.2 = 0.0
0.0 + -4p + p2 = 0 + -0.2
-4p + p2 = 0 + -0.2

Combine like terms: 0 + -0.2 = -0.2
-4p + p2 = -0.2

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 = -0.2 + 4

Reorder the terms:
4 + -4p + p2 = -0.2 + 4

Combine like terms: -0.2 + 4 = 3.8
4 + -4p + p2 = 3.8

Factor a perfect square on the left side:
(p + -2)(p + -2) = 3.8

Calculate the square root of the right side: 1.949358869

Break this problem into two subproblems by setting 
(p + -2) equal to 1.949358869 and -1.949358869.

Subproblem 1

p + -2 = 1.949358869 Simplifying p + -2 = 1.949358869 Reorder the terms: -2 + p = 1.949358869 Solving -2 + p = 1.949358869 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 = 1.949358869 + 2 Combine like terms: -2 + 2 = 0 0 + p = 1.949358869 + 2 p = 1.949358869 + 2 Combine like terms: 1.949358869 + 2 = 3.949358869 p = 3.949358869 Simplifying p = 3.949358869

Subproblem 2

p + -2 = -1.949358869 Simplifying p + -2 = -1.949358869 Reorder the terms: -2 + p = -1.949358869 Solving -2 + p = -1.949358869 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 = -1.949358869 + 2 Combine like terms: -2 + 2 = 0 0 + p = -1.949358869 + 2 p = -1.949358869 + 2 Combine like terms: -1.949358869 + 2 = 0.050641131 p = 0.050641131 Simplifying p = 0.050641131

Solution

The solution to the problem is based on the solutions from the subproblems. p = {3.949358869, 0.050641131}

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