2+5c=2c(c-2)

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Solution for 2+5c=2c(c-2) equation:


Simplifying
2 + 5c = 2c(c + -2)

Reorder the terms:
2 + 5c = 2c(-2 + c)
2 + 5c = (-2 * 2c + c * 2c)
2 + 5c = (-4c + 2c2)

Solving
2 + 5c = -4c + 2c2

Solving for variable 'c'.

Combine like terms: 5c + 4c = 9c
2 + 9c + -2c2 = -4c + 2c2 + 4c + -2c2

Reorder the terms:
2 + 9c + -2c2 = -4c + 4c + 2c2 + -2c2

Combine like terms: -4c + 4c = 0
2 + 9c + -2c2 = 0 + 2c2 + -2c2
2 + 9c + -2c2 = 2c2 + -2c2

Combine like terms: 2c2 + -2c2 = 0
2 + 9c + -2c2 = 0

Begin completing the square.  Divide all terms by
-2 the coefficient of the squared term: 

Divide each side by '-2'.
-1 + -4.5c + c2 = 0

Move the constant term to the right:

Add '1' to each side of the equation.
-1 + -4.5c + 1 + c2 = 0 + 1

Reorder the terms:
-1 + 1 + -4.5c + c2 = 0 + 1

Combine like terms: -1 + 1 = 0
0 + -4.5c + c2 = 0 + 1
-4.5c + c2 = 0 + 1

Combine like terms: 0 + 1 = 1
-4.5c + c2 = 1

The c term is -4.5c.  Take half its coefficient (-2.25).
Square it (5.0625) and add it to both sides.

Add '5.0625' to each side of the equation.
-4.5c + 5.0625 + c2 = 1 + 5.0625

Reorder the terms:
5.0625 + -4.5c + c2 = 1 + 5.0625

Combine like terms: 1 + 5.0625 = 6.0625
5.0625 + -4.5c + c2 = 6.0625

Factor a perfect square on the left side:
(c + -2.25)(c + -2.25) = 6.0625

Calculate the square root of the right side: 2.46221445

Break this problem into two subproblems by setting 
(c + -2.25) equal to 2.46221445 and -2.46221445.

Subproblem 1

c + -2.25 = 2.46221445 Simplifying c + -2.25 = 2.46221445 Reorder the terms: -2.25 + c = 2.46221445 Solving -2.25 + c = 2.46221445 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + c = 2.46221445 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + c = 2.46221445 + 2.25 c = 2.46221445 + 2.25 Combine like terms: 2.46221445 + 2.25 = 4.71221445 c = 4.71221445 Simplifying c = 4.71221445

Subproblem 2

c + -2.25 = -2.46221445 Simplifying c + -2.25 = -2.46221445 Reorder the terms: -2.25 + c = -2.46221445 Solving -2.25 + c = -2.46221445 Solving for variable 'c'. Move all terms containing c to the left, all other terms to the right. Add '2.25' to each side of the equation. -2.25 + 2.25 + c = -2.46221445 + 2.25 Combine like terms: -2.25 + 2.25 = 0.00 0.00 + c = -2.46221445 + 2.25 c = -2.46221445 + 2.25 Combine like terms: -2.46221445 + 2.25 = -0.21221445 c = -0.21221445 Simplifying c = -0.21221445

Solution

The solution to the problem is based on the solutions from the subproblems. c = {4.71221445, -0.21221445}

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