c(c+2)+(c+4)=27

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Solution for c(c+2)+(c+4)=27 equation:


Simplifying
c(c + 2) + (c + 4) = 27

Reorder the terms:
c(2 + c) + (c + 4) = 27
(2 * c + c * c) + (c + 4) = 27
(2c + c2) + (c + 4) = 27

Reorder the terms:
2c + c2 + (4 + c) = 27

Remove parenthesis around (4 + c)
2c + c2 + 4 + c = 27

Reorder the terms:
4 + 2c + c + c2 = 27

Combine like terms: 2c + c = 3c
4 + 3c + c2 = 27

Solving
4 + 3c + c2 = 27

Solving for variable 'c'.

Reorder the terms:
4 + -27 + 3c + c2 = 27 + -27

Combine like terms: 4 + -27 = -23
-23 + 3c + c2 = 27 + -27

Combine like terms: 27 + -27 = 0
-23 + 3c + c2 = 0

Begin completing the square.

Move the constant term to the right:

Add '23' to each side of the equation.
-23 + 3c + 23 + c2 = 0 + 23

Reorder the terms:
-23 + 23 + 3c + c2 = 0 + 23

Combine like terms: -23 + 23 = 0
0 + 3c + c2 = 0 + 23
3c + c2 = 0 + 23

Combine like terms: 0 + 23 = 23
3c + c2 = 23

The c term is 3c.  Take half its coefficient (1.5).
Square it (2.25) and add it to both sides.

Add '2.25' to each side of the equation.
3c + 2.25 + c2 = 23 + 2.25

Reorder the terms:
2.25 + 3c + c2 = 23 + 2.25

Combine like terms: 23 + 2.25 = 25.25
2.25 + 3c + c2 = 25.25

Factor a perfect square on the left side:
(c + 1.5)(c + 1.5) = 25.25

Calculate the square root of the right side: 5.024937811

Break this problem into two subproblems by setting 
(c + 1.5) equal to 5.024937811 and -5.024937811.

Subproblem 1

c + 1.5 = 5.024937811 Simplifying c + 1.5 = 5.024937811 Reorder the terms: 1.5 + c = 5.024937811 Solving 1.5 + c = 5.024937811 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + c = 5.024937811 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + c = 5.024937811 + -1.5 c = 5.024937811 + -1.5 Combine like terms: 5.024937811 + -1.5 = 3.524937811 c = 3.524937811 Simplifying c = 3.524937811

Subproblem 2

c + 1.5 = -5.024937811 Simplifying c + 1.5 = -5.024937811 Reorder the terms: 1.5 + c = -5.024937811 Solving 1.5 + c = -5.024937811 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '-1.5' to each side of the equation. 1.5 + -1.5 + c = -5.024937811 + -1.5 Combine like terms: 1.5 + -1.5 = 0.0 0.0 + c = -5.024937811 + -1.5 c = -5.024937811 + -1.5 Combine like terms: -5.024937811 + -1.5 = -6.524937811 c = -6.524937811 Simplifying c = -6.524937811

Solution

The solution to the problem is based on the solutions from the subproblems. c = {3.524937811, -6.524937811}

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