2p^2+2p-19=0

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Solution for 2p^2+2p-19=0 equation:


Simplifying
2p2 + 2p + -19 = 0

Reorder the terms:
-19 + 2p + 2p2 = 0

Solving
-19 + 2p + 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'.
-9.5 + p + p2 = 0

Move the constant term to the right:

Add '9.5' to each side of the equation.
-9.5 + p + 9.5 + p2 = 0 + 9.5

Reorder the terms:
-9.5 + 9.5 + p + p2 = 0 + 9.5

Combine like terms: -9.5 + 9.5 = 0.0
0.0 + p + p2 = 0 + 9.5
p + p2 = 0 + 9.5

Combine like terms: 0 + 9.5 = 9.5
p + p2 = 9.5

The p term is p.  Take half its coefficient (0.5).
Square it (0.25) and add it to both sides.

Add '0.25' to each side of the equation.
 + 0.25 + p2 = 9.5 + 0.25

Combine like terms:  + 0.25 = 1.25
1.25 + p2 = 9.5 + 0.25

Combine like terms: 9.5 + 0.25 = 9.75
1.25 + p2 = 9.75

Factor a perfect square on the left side:
(p + 0.5)(p + 0.5) = 9.75

Calculate the square root of the right side: 3.122498999

Break this problem into two subproblems by setting 
(p + 0.5) equal to 3.122498999 and -3.122498999.

Subproblem 1

p + 0.5 = 3.122498999 Simplifying p + 0.5 = 3.122498999 Reorder the terms: 0.5 + p = 3.122498999 Solving 0.5 + p = 3.122498999 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + p = 3.122498999 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = 3.122498999 + -0.5 p = 3.122498999 + -0.5 Combine like terms: 3.122498999 + -0.5 = 2.622498999 p = 2.622498999 Simplifying p = 2.622498999

Subproblem 2

p + 0.5 = -3.122498999 Simplifying p + 0.5 = -3.122498999 Reorder the terms: 0.5 + p = -3.122498999 Solving 0.5 + p = -3.122498999 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-0.5' to each side of the equation. 0.5 + -0.5 + p = -3.122498999 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = -3.122498999 + -0.5 p = -3.122498999 + -0.5 Combine like terms: -3.122498999 + -0.5 = -3.622498999 p = -3.622498999 Simplifying p = -3.622498999

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.622498999, -3.622498999}

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