-18c(c-1)-18=

Solution for -18c(c-1)-18= equation:

Simplifying
-18c(c + -1) + -18 = 0

Reorder the terms:
-18c(-1 + c) + -18 = 0
(-1 * -18c + c * -18c) + -18 = 0
(18c + -18c2) + -18 = 0

Reorder the terms:
-18 + 18c + -18c2 = 0

Solving
-18 + 18c + -18c2 = 0

Solving for variable 'c'.

Factor out the Greatest Common Factor (GCF), '18'.
18(-1 + c + -1c2) = 0

Ignore the factor 18.
Subproblem 1
Set the factor '(-1 + c + -1c2)' equal to zero and attempt to solve:

Simplifying
-1 + c + -1c2 = 0

Solving
-1 + c + -1c2 = 0

Begin completing the square.  Divide all terms by
-1 the coefficient of the squared term: 

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

Move the constant term to the right:

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

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

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

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

The c term is c.  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.
-1c + 0.25 + c2 = -1 + 0.25

Reorder the terms:
0.25 + -1c + c2 = -1 + 0.25

Combine like terms: -1 + 0.25 = -0.75
0.25 + -1c + c2 = -0.75

Factor a perfect square on the left side:
(c + 0.5)(c + 0.5) = -0.75

Can't calculate square root of the right side.

The solution to this equation could not be determined.

This subproblem is being ignored because a solution could not be determined.

The solution to this equation could not be determined.