p^2-15p+30=0

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Solution for p^2-15p+30=0 equation:


Simplifying
p2 + -15p + 30 = 0

Reorder the terms:
30 + -15p + p2 = 0

Solving
30 + -15p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-30' to each side of the equation.
30 + -15p + -30 + p2 = 0 + -30

Reorder the terms:
30 + -30 + -15p + p2 = 0 + -30

Combine like terms: 30 + -30 = 0
0 + -15p + p2 = 0 + -30
-15p + p2 = 0 + -30

Combine like terms: 0 + -30 = -30
-15p + p2 = -30

The p term is -15p.  Take half its coefficient (-7.5).
Square it (56.25) and add it to both sides.

Add '56.25' to each side of the equation.
-15p + 56.25 + p2 = -30 + 56.25

Reorder the terms:
56.25 + -15p + p2 = -30 + 56.25

Combine like terms: -30 + 56.25 = 26.25
56.25 + -15p + p2 = 26.25

Factor a perfect square on the left side:
(p + -7.5)(p + -7.5) = 26.25

Calculate the square root of the right side: 5.123475383

Break this problem into two subproblems by setting 
(p + -7.5) equal to 5.123475383 and -5.123475383.

Subproblem 1

p + -7.5 = 5.123475383 Simplifying p + -7.5 = 5.123475383 Reorder the terms: -7.5 + p = 5.123475383 Solving -7.5 + p = 5.123475383 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + p = 5.123475383 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + p = 5.123475383 + 7.5 p = 5.123475383 + 7.5 Combine like terms: 5.123475383 + 7.5 = 12.623475383 p = 12.623475383 Simplifying p = 12.623475383

Subproblem 2

p + -7.5 = -5.123475383 Simplifying p + -7.5 = -5.123475383 Reorder the terms: -7.5 + p = -5.123475383 Solving -7.5 + p = -5.123475383 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '7.5' to each side of the equation. -7.5 + 7.5 + p = -5.123475383 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + p = -5.123475383 + 7.5 p = -5.123475383 + 7.5 Combine like terms: -5.123475383 + 7.5 = 2.376524617 p = 2.376524617 Simplifying p = 2.376524617

Solution

The solution to the problem is based on the solutions from the subproblems. p = {12.623475383, 2.376524617}

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