p^2-8p+9=0

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Solution for p^2-8p+9=0 equation:


Simplifying
p2 + -8p + 9 = 0

Reorder the terms:
9 + -8p + p2 = 0

Solving
9 + -8p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-9' to each side of the equation.
9 + -8p + -9 + p2 = 0 + -9

Reorder the terms:
9 + -9 + -8p + p2 = 0 + -9

Combine like terms: 9 + -9 = 0
0 + -8p + p2 = 0 + -9
-8p + p2 = 0 + -9

Combine like terms: 0 + -9 = -9
-8p + p2 = -9

The p term is -8p.  Take half its coefficient (-4).
Square it (16) and add it to both sides.

Add '16' to each side of the equation.
-8p + 16 + p2 = -9 + 16

Reorder the terms:
16 + -8p + p2 = -9 + 16

Combine like terms: -9 + 16 = 7
16 + -8p + p2 = 7

Factor a perfect square on the left side:
(p + -4)(p + -4) = 7

Calculate the square root of the right side: 2.645751311

Break this problem into two subproblems by setting 
(p + -4) equal to 2.645751311 and -2.645751311.

Subproblem 1

p + -4 = 2.645751311 Simplifying p + -4 = 2.645751311 Reorder the terms: -4 + p = 2.645751311 Solving -4 + p = 2.645751311 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + p = 2.645751311 + 4 Combine like terms: -4 + 4 = 0 0 + p = 2.645751311 + 4 p = 2.645751311 + 4 Combine like terms: 2.645751311 + 4 = 6.645751311 p = 6.645751311 Simplifying p = 6.645751311

Subproblem 2

p + -4 = -2.645751311 Simplifying p + -4 = -2.645751311 Reorder the terms: -4 + p = -2.645751311 Solving -4 + p = -2.645751311 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4' to each side of the equation. -4 + 4 + p = -2.645751311 + 4 Combine like terms: -4 + 4 = 0 0 + p = -2.645751311 + 4 p = -2.645751311 + 4 Combine like terms: -2.645751311 + 4 = 1.354248689 p = 1.354248689 Simplifying p = 1.354248689

Solution

The solution to the problem is based on the solutions from the subproblems. p = {6.645751311, 1.354248689}

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