(p-3)(p-3)-18=0

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Solution for (p-3)(p-3)-18=0 equation:


Simplifying
(p + -3)(p + -3) + -18 = 0

Reorder the terms:
(-3 + p)(p + -3) + -18 = 0

Reorder the terms:
(-3 + p)(-3 + p) + -18 = 0

Multiply (-3 + p) * (-3 + p)
(-3(-3 + p) + p(-3 + p)) + -18 = 0
((-3 * -3 + p * -3) + p(-3 + p)) + -18 = 0
((9 + -3p) + p(-3 + p)) + -18 = 0
(9 + -3p + (-3 * p + p * p)) + -18 = 0
(9 + -3p + (-3p + p2)) + -18 = 0

Combine like terms: -3p + -3p = -6p
(9 + -6p + p2) + -18 = 0

Reorder the terms:
9 + -18 + -6p + p2 = 0

Combine like terms: 9 + -18 = -9
-9 + -6p + p2 = 0

Solving
-9 + -6p + 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 + -6p + 9 + p2 = 0 + 9

Reorder the terms:
-9 + 9 + -6p + p2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + -6p + p2 = 0 + 9
-6p + p2 = 0 + 9

Combine like terms: 0 + 9 = 9
-6p + p2 = 9

The p term is -6p.  Take half its coefficient (-3).
Square it (9) and add it to both sides.

Add '9' to each side of the equation.
-6p + 9 + p2 = 9 + 9

Reorder the terms:
9 + -6p + p2 = 9 + 9

Combine like terms: 9 + 9 = 18
9 + -6p + p2 = 18

Factor a perfect square on the left side:
(p + -3)(p + -3) = 18

Calculate the square root of the right side: 4.242640687

Break this problem into two subproblems by setting 
(p + -3) equal to 4.242640687 and -4.242640687.

Subproblem 1

p + -3 = 4.242640687 Simplifying p + -3 = 4.242640687 Reorder the terms: -3 + p = 4.242640687 Solving -3 + p = 4.242640687 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + p = 4.242640687 + 3 Combine like terms: -3 + 3 = 0 0 + p = 4.242640687 + 3 p = 4.242640687 + 3 Combine like terms: 4.242640687 + 3 = 7.242640687 p = 7.242640687 Simplifying p = 7.242640687

Subproblem 2

p + -3 = -4.242640687 Simplifying p + -3 = -4.242640687 Reorder the terms: -3 + p = -4.242640687 Solving -3 + p = -4.242640687 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '3' to each side of the equation. -3 + 3 + p = -4.242640687 + 3 Combine like terms: -3 + 3 = 0 0 + p = -4.242640687 + 3 p = -4.242640687 + 3 Combine like terms: -4.242640687 + 3 = -1.242640687 p = -1.242640687 Simplifying p = -1.242640687

Solution

The solution to the problem is based on the solutions from the subproblems. p = {7.242640687, -1.242640687}

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