p^2+2p-31=0

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Solution for p^2+2p-31=0 equation:


Simplifying
p2 + 2p + -31 = 0

Reorder the terms:
-31 + 2p + p2 = 0

Solving
-31 + 2p + p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '31' to each side of the equation.
-31 + 2p + 31 + p2 = 0 + 31

Reorder the terms:
-31 + 31 + 2p + p2 = 0 + 31

Combine like terms: -31 + 31 = 0
0 + 2p + p2 = 0 + 31
2p + p2 = 0 + 31

Combine like terms: 0 + 31 = 31
2p + p2 = 31

The p term is 2p.  Take half its coefficient (1).
Square it (1) and add it to both sides.

Add '1' to each side of the equation.
2p + 1 + p2 = 31 + 1

Reorder the terms:
1 + 2p + p2 = 31 + 1

Combine like terms: 31 + 1 = 32
1 + 2p + p2 = 32

Factor a perfect square on the left side:
(p + 1)(p + 1) = 32

Calculate the square root of the right side: 5.656854249

Break this problem into two subproblems by setting 
(p + 1) equal to 5.656854249 and -5.656854249.

Subproblem 1

p + 1 = 5.656854249 Simplifying p + 1 = 5.656854249 Reorder the terms: 1 + p = 5.656854249 Solving 1 + p = 5.656854249 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = 5.656854249 + -1 Combine like terms: 1 + -1 = 0 0 + p = 5.656854249 + -1 p = 5.656854249 + -1 Combine like terms: 5.656854249 + -1 = 4.656854249 p = 4.656854249 Simplifying p = 4.656854249

Subproblem 2

p + 1 = -5.656854249 Simplifying p + 1 = -5.656854249 Reorder the terms: 1 + p = -5.656854249 Solving 1 + p = -5.656854249 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-1' to each side of the equation. 1 + -1 + p = -5.656854249 + -1 Combine like terms: 1 + -1 = 0 0 + p = -5.656854249 + -1 p = -5.656854249 + -1 Combine like terms: -5.656854249 + -1 = -6.656854249 p = -6.656854249 Simplifying p = -6.656854249

Solution

The solution to the problem is based on the solutions from the subproblems. p = {4.656854249, -6.656854249}

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