p+1(p^2+10p+21)=

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Solution for p+1(p^2+10p+21)= equation:


Simplifying
p + 1(p2 + 10p + 21) = 0

Reorder the terms:
p + 1(21 + 10p + p2) = 0
p + (21 * 1 + 10p * 1 + p2 * 1) = 0
p + (21 + 10p + 1p2) = 0

Reorder the terms:
21 + p + 10p + 1p2 = 0

Combine like terms: p + 10p = 11p
21 + 11p + 1p2 = 0

Solving
21 + 11p + 1p2 = 0

Solving for variable 'p'.

Begin completing the square.

Move the constant term to the right:

Add '-21' to each side of the equation.
21 + 11p + -21 + p2 = 0 + -21

Reorder the terms:
21 + -21 + 11p + p2 = 0 + -21

Combine like terms: 21 + -21 = 0
0 + 11p + p2 = 0 + -21
11p + p2 = 0 + -21

Combine like terms: 0 + -21 = -21
11p + p2 = -21

The p term is 11p.  Take half its coefficient (5.5).
Square it (30.25) and add it to both sides.

Add '30.25' to each side of the equation.
11p + 30.25 + p2 = -21 + 30.25

Reorder the terms:
30.25 + 11p + p2 = -21 + 30.25

Combine like terms: -21 + 30.25 = 9.25
30.25 + 11p + p2 = 9.25

Factor a perfect square on the left side:
(p + 5.5)(p + 5.5) = 9.25

Calculate the square root of the right side: 3.041381265

Break this problem into two subproblems by setting 
(p + 5.5) equal to 3.041381265 and -3.041381265.

Subproblem 1

p + 5.5 = 3.041381265 Simplifying p + 5.5 = 3.041381265 Reorder the terms: 5.5 + p = 3.041381265 Solving 5.5 + p = 3.041381265 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + p = 3.041381265 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + p = 3.041381265 + -5.5 p = 3.041381265 + -5.5 Combine like terms: 3.041381265 + -5.5 = -2.458618735 p = -2.458618735 Simplifying p = -2.458618735

Subproblem 2

p + 5.5 = -3.041381265 Simplifying p + 5.5 = -3.041381265 Reorder the terms: 5.5 + p = -3.041381265 Solving 5.5 + p = -3.041381265 Solving for variable 'p'. Move all terms containing p to the left, all other terms to the right. Add '-5.5' to each side of the equation. 5.5 + -5.5 + p = -3.041381265 + -5.5 Combine like terms: 5.5 + -5.5 = 0.0 0.0 + p = -3.041381265 + -5.5 p = -3.041381265 + -5.5 Combine like terms: -3.041381265 + -5.5 = -8.541381265 p = -8.541381265 Simplifying p = -8.541381265

Solution

The solution to the problem is based on the solutions from the subproblems. p = {-2.458618735, -8.541381265}

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