p^2-20p+49=0

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Solution for p^2-20p+49=0 equation:


Simplifying
p2 + -20p + 49 = 0

Reorder the terms:
49 + -20p + p2 = 0

Solving
49 + -20p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-49' to each side of the equation.
49 + -20p + -49 + p2 = 0 + -49

Reorder the terms:
49 + -49 + -20p + p2 = 0 + -49

Combine like terms: 49 + -49 = 0
0 + -20p + p2 = 0 + -49
-20p + p2 = 0 + -49

Combine like terms: 0 + -49 = -49
-20p + p2 = -49

The p term is -20p.  Take half its coefficient (-10).
Square it (100) and add it to both sides.

Add '100' to each side of the equation.
-20p + 100 + p2 = -49 + 100

Reorder the terms:
100 + -20p + p2 = -49 + 100

Combine like terms: -49 + 100 = 51
100 + -20p + p2 = 51

Factor a perfect square on the left side:
(p + -10)(p + -10) = 51

Calculate the square root of the right side: 7.141428429

Break this problem into two subproblems by setting 
(p + -10) equal to 7.141428429 and -7.141428429.

Subproblem 1

p + -10 = 7.141428429 Simplifying p + -10 = 7.141428429 Reorder the terms: -10 + p = 7.141428429 Solving -10 + p = 7.141428429 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + p = 7.141428429 + 10 Combine like terms: -10 + 10 = 0 0 + p = 7.141428429 + 10 p = 7.141428429 + 10 Combine like terms: 7.141428429 + 10 = 17.141428429 p = 17.141428429 Simplifying p = 17.141428429

Subproblem 2

p + -10 = -7.141428429 Simplifying p + -10 = -7.141428429 Reorder the terms: -10 + p = -7.141428429 Solving -10 + p = -7.141428429 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '10' to each side of the equation. -10 + 10 + p = -7.141428429 + 10 Combine like terms: -10 + 10 = 0 0 + p = -7.141428429 + 10 p = -7.141428429 + 10 Combine like terms: -7.141428429 + 10 = 2.858571571 p = 2.858571571 Simplifying p = 2.858571571

Solution

The solution to the problem is based on the solutions from the subproblems. p = {17.141428429, 2.858571571}

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