p^2=-p+7

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


Simplifying
p2 = -1p + 7

Reorder the terms:
p2 = 7 + -1p

Solving
p2 = 7 + -1p

Solving for variable 'p'.

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

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

Combine like terms: 7 + -7 = 0
-7 + p + p2 = 0 + -1p + p
-7 + p + p2 = -1p + p

Combine like terms: -1p + p = 0
-7 + p + p2 = 0

Begin completing the square.

Move the constant term to the right:

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

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

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

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

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.
p + 0.25 + p2 = 7 + 0.25

Reorder the terms:
0.25 + p + p2 = 7 + 0.25

Combine like terms: 7 + 0.25 = 7.25
0.25 + p + p2 = 7.25

Factor a perfect square on the left side:
(p + 0.5)(p + 0.5) = 7.25

Calculate the square root of the right side: 2.692582404

Break this problem into two subproblems by setting 
(p + 0.5) equal to 2.692582404 and -2.692582404.

Subproblem 1

p + 0.5 = 2.692582404 Simplifying p + 0.5 = 2.692582404 Reorder the terms: 0.5 + p = 2.692582404 Solving 0.5 + p = 2.692582404 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 = 2.692582404 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = 2.692582404 + -0.5 p = 2.692582404 + -0.5 Combine like terms: 2.692582404 + -0.5 = 2.192582404 p = 2.192582404 Simplifying p = 2.192582404

Subproblem 2

p + 0.5 = -2.692582404 Simplifying p + 0.5 = -2.692582404 Reorder the terms: 0.5 + p = -2.692582404 Solving 0.5 + p = -2.692582404 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 = -2.692582404 + -0.5 Combine like terms: 0.5 + -0.5 = 0.0 0.0 + p = -2.692582404 + -0.5 p = -2.692582404 + -0.5 Combine like terms: -2.692582404 + -0.5 = -3.192582404 p = -3.192582404 Simplifying p = -3.192582404

Solution

The solution to the problem is based on the solutions from the subproblems. p = {2.192582404, -3.192582404}

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