4=-(p^2+7p)

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Solution for 4=-(p^2+7p) equation:


Simplifying
4 = -1(p2 + 7p)

Reorder the terms:
4 = -1(7p + p2)
4 = (7p * -1 + p2 * -1)
4 = (-7p + -1p2)

Solving
4 = -7p + -1p2

Solving for variable 'p'.

Reorder the terms:
4 + 7p + p2 = -7p + 7p + -1p2 + p2

Combine like terms: -7p + 7p = 0
4 + 7p + p2 = 0 + -1p2 + p2
4 + 7p + p2 = -1p2 + p2

Combine like terms: -1p2 + p2 = 0
4 + 7p + p2 = 0

Begin completing the square.

Move the constant term to the right:

Add '-4' to each side of the equation.
4 + 7p + -4 + p2 = 0 + -4

Reorder the terms:
4 + -4 + 7p + p2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + 7p + p2 = 0 + -4
7p + p2 = 0 + -4

Combine like terms: 0 + -4 = -4
7p + p2 = -4

The p term is 7p.  Take half its coefficient (3.5).
Square it (12.25) and add it to both sides.

Add '12.25' to each side of the equation.
7p + 12.25 + p2 = -4 + 12.25

Reorder the terms:
12.25 + 7p + p2 = -4 + 12.25

Combine like terms: -4 + 12.25 = 8.25
12.25 + 7p + p2 = 8.25

Factor a perfect square on the left side:
(p + 3.5)(p + 3.5) = 8.25

Calculate the square root of the right side: 2.872281323

Break this problem into two subproblems by setting 
(p + 3.5) equal to 2.872281323 and -2.872281323.

Subproblem 1

p + 3.5 = 2.872281323 Simplifying p + 3.5 = 2.872281323 Reorder the terms: 3.5 + p = 2.872281323 Solving 3.5 + p = 2.872281323 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + p = 2.872281323 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + p = 2.872281323 + -3.5 p = 2.872281323 + -3.5 Combine like terms: 2.872281323 + -3.5 = -0.627718677 p = -0.627718677 Simplifying p = -0.627718677

Subproblem 2

p + 3.5 = -2.872281323 Simplifying p + 3.5 = -2.872281323 Reorder the terms: 3.5 + p = -2.872281323 Solving 3.5 + p = -2.872281323 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-3.5' to each side of the equation. 3.5 + -3.5 + p = -2.872281323 + -3.5 Combine like terms: 3.5 + -3.5 = 0.0 0.0 + p = -2.872281323 + -3.5 p = -2.872281323 + -3.5 Combine like terms: -2.872281323 + -3.5 = -6.372281323 p = -6.372281323 Simplifying p = -6.372281323

Solution

The solution to the problem is based on the solutions from the subproblems. p = {-0.627718677, -6.372281323}

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