2c^2-c=-128

Solution for 2c^2-c=-128 equation:

Simplifying
2c2 + -1c = -128

Reorder the terms:
-1c + 2c2 = -128

Solving
-1c + 2c2 = -128

Solving for variable 'c'.

Reorder the terms:
128 + -1c + 2c2 = -128 + 128

Combine like terms: -128 + 128 = 0
128 + -1c + 2c2 = 0

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

Divide each side by '2'.
64 + -0.5c + c2 = 0

Move the constant term to the right:

Add '-64' to each side of the equation.
64 + -0.5c + -64 + c2 = 0 + -64

Reorder the terms:
64 + -64 + -0.5c + c2 = 0 + -64

Combine like terms: 64 + -64 = 0
0 + -0.5c + c2 = 0 + -64
-0.5c + c2 = 0 + -64

Combine like terms: 0 + -64 = -64
-0.5c + c2 = -64

The c term is -0.5c.  Take half its coefficient (-0.25).
Square it (0.0625) and add it to both sides.

Add '0.0625' to each side of the equation.
-0.5c + 0.0625 + c2 = -64 + 0.0625

Reorder the terms:
0.0625 + -0.5c + c2 = -64 + 0.0625

Combine like terms: -64 + 0.0625 = -63.9375
0.0625 + -0.5c + c2 = -63.9375

Factor a perfect square on the left side:
(c + -0.25)(c + -0.25) = -63.9375

Can't calculate square root of the right side.

The solution to this equation could not be determined.