255=144+c^2

Solution for 255=144+c^2 equation:

Simplifying
255 = 144 + c2

Solving
255 = 144 + c2

Solving for variable 'c'.

Move all terms containing c to the left, all other terms to the right.

Add '-1c2' to each side of the equation.
255 + -1c2 = 144 + c2 + -1c2

Combine like terms: c2 + -1c2 = 0
255 + -1c2 = 144 + 0
255 + -1c2 = 144

Add '-255' to each side of the equation.
255 + -255 + -1c2 = 144 + -255

Combine like terms: 255 + -255 = 0
0 + -1c2 = 144 + -255
-1c2 = 144 + -255

Combine like terms: 144 + -255 = -111
-1c2 = -111

Divide each side by '-1'.
c2 = 111

Simplifying
c2 = 111

Take the square root of each side:
c = {-10.535653753, 10.535653753}