p^2-15p+8=43

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Solution for p^2-15p+8=43 equation:


Simplifying
p2 + -15p + 8 = 43

Reorder the terms:
8 + -15p + p2 = 43

Solving
8 + -15p + p2 = 43

Solving for variable 'p'.

Reorder the terms:
8 + -43 + -15p + p2 = 43 + -43

Combine like terms: 8 + -43 = -35
-35 + -15p + p2 = 43 + -43

Combine like terms: 43 + -43 = 0
-35 + -15p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '35' to each side of the equation.
-35 + -15p + 35 + p2 = 0 + 35

Reorder the terms:
-35 + 35 + -15p + p2 = 0 + 35

Combine like terms: -35 + 35 = 0
0 + -15p + p2 = 0 + 35
-15p + p2 = 0 + 35

Combine like terms: 0 + 35 = 35
-15p + p2 = 35

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 = 35 + 56.25

Reorder the terms:
56.25 + -15p + p2 = 35 + 56.25

Combine like terms: 35 + 56.25 = 91.25
56.25 + -15p + p2 = 91.25

Factor a perfect square on the left side:
(p + -7.5)(p + -7.5) = 91.25

Calculate the square root of the right side: 9.552486587

Break this problem into two subproblems by setting 
(p + -7.5) equal to 9.552486587 and -9.552486587.

Subproblem 1

p + -7.5 = 9.552486587 Simplifying p + -7.5 = 9.552486587 Reorder the terms: -7.5 + p = 9.552486587 Solving -7.5 + p = 9.552486587 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 = 9.552486587 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + p = 9.552486587 + 7.5 p = 9.552486587 + 7.5 Combine like terms: 9.552486587 + 7.5 = 17.052486587 p = 17.052486587 Simplifying p = 17.052486587

Subproblem 2

p + -7.5 = -9.552486587 Simplifying p + -7.5 = -9.552486587 Reorder the terms: -7.5 + p = -9.552486587 Solving -7.5 + p = -9.552486587 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 = -9.552486587 + 7.5 Combine like terms: -7.5 + 7.5 = 0.0 0.0 + p = -9.552486587 + 7.5 p = -9.552486587 + 7.5 Combine like terms: -9.552486587 + 7.5 = -2.052486587 p = -2.052486587 Simplifying p = -2.052486587

Solution

The solution to the problem is based on the solutions from the subproblems. p = {17.052486587, -2.052486587}

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