2p^2-18p+15=0

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Solution for 2p^2-18p+15=0 equation:


Simplifying
2p2 + -18p + 15 = 0

Reorder the terms:
15 + -18p + 2p2 = 0

Solving
15 + -18p + 2p2 = 0

Solving for variable 'p'.

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

Divide each side by '2'.
7.5 + -9p + p2 = 0

Move the constant term to the right:

Add '-7.5' to each side of the equation.
7.5 + -9p + -7.5 + p2 = 0 + -7.5

Reorder the terms:
7.5 + -7.5 + -9p + p2 = 0 + -7.5

Combine like terms: 7.5 + -7.5 = 0.0
0.0 + -9p + p2 = 0 + -7.5
-9p + p2 = 0 + -7.5

Combine like terms: 0 + -7.5 = -7.5
-9p + p2 = -7.5

The p term is -9p.  Take half its coefficient (-4.5).
Square it (20.25) and add it to both sides.

Add '20.25' to each side of the equation.
-9p + 20.25 + p2 = -7.5 + 20.25

Reorder the terms:
20.25 + -9p + p2 = -7.5 + 20.25

Combine like terms: -7.5 + 20.25 = 12.75
20.25 + -9p + p2 = 12.75

Factor a perfect square on the left side:
(p + -4.5)(p + -4.5) = 12.75

Calculate the square root of the right side: 3.570714214

Break this problem into two subproblems by setting 
(p + -4.5) equal to 3.570714214 and -3.570714214.

Subproblem 1

p + -4.5 = 3.570714214 Simplifying p + -4.5 = 3.570714214 Reorder the terms: -4.5 + p = 3.570714214 Solving -4.5 + p = 3.570714214 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + p = 3.570714214 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + p = 3.570714214 + 4.5 p = 3.570714214 + 4.5 Combine like terms: 3.570714214 + 4.5 = 8.070714214 p = 8.070714214 Simplifying p = 8.070714214

Subproblem 2

p + -4.5 = -3.570714214 Simplifying p + -4.5 = -3.570714214 Reorder the terms: -4.5 + p = -3.570714214 Solving -4.5 + p = -3.570714214 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '4.5' to each side of the equation. -4.5 + 4.5 + p = -3.570714214 + 4.5 Combine like terms: -4.5 + 4.5 = 0.0 0.0 + p = -3.570714214 + 4.5 p = -3.570714214 + 4.5 Combine like terms: -3.570714214 + 4.5 = 0.929285786 p = 0.929285786 Simplifying p = 0.929285786

Solution

The solution to the problem is based on the solutions from the subproblems. p = {8.070714214, 0.929285786}

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