-p^2+2p+7=0

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Solution for -p^2+2p+7=0 equation:


Simplifying
-1p2 + 2p + 7 = 0

Reorder the terms:
7 + 2p + -1p2 = 0

Solving
7 + 2p + -1p2 = 0

Solving for variable 'p'.

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

Divide each side by '-1'.
-7 + -2p + p2 = 0

Move the constant term to the right:

Add '7' to each side of the equation.
-7 + -2p + 7 + p2 = 0 + 7

Reorder the terms:
-7 + 7 + -2p + p2 = 0 + 7

Combine like terms: -7 + 7 = 0
0 + -2p + p2 = 0 + 7
-2p + p2 = 0 + 7

Combine like terms: 0 + 7 = 7
-2p + p2 = 7

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 = 7 + 1

Reorder the terms:
1 + -2p + p2 = 7 + 1

Combine like terms: 7 + 1 = 8
1 + -2p + p2 = 8

Factor a perfect square on the left side:
(p + -1)(p + -1) = 8

Calculate the square root of the right side: 2.828427125

Break this problem into two subproblems by setting 
(p + -1) equal to 2.828427125 and -2.828427125.

Subproblem 1

p + -1 = 2.828427125 Simplifying p + -1 = 2.828427125 Reorder the terms: -1 + p = 2.828427125 Solving -1 + p = 2.828427125 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 = 2.828427125 + 1 Combine like terms: -1 + 1 = 0 0 + p = 2.828427125 + 1 p = 2.828427125 + 1 Combine like terms: 2.828427125 + 1 = 3.828427125 p = 3.828427125 Simplifying p = 3.828427125

Subproblem 2

p + -1 = -2.828427125 Simplifying p + -1 = -2.828427125 Reorder the terms: -1 + p = -2.828427125 Solving -1 + p = -2.828427125 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 = -2.828427125 + 1 Combine like terms: -1 + 1 = 0 0 + p = -2.828427125 + 1 p = -2.828427125 + 1 Combine like terms: -2.828427125 + 1 = -1.828427125 p = -1.828427125 Simplifying p = -1.828427125

Solution

The solution to the problem is based on the solutions from the subproblems. p = {3.828427125, -1.828427125}

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