81+144=c^2

Solution for 81+144=c^2 equation:

Simplifying
81 + 144 = c2

Combine like terms: 81 + 144 = 225
225 = c2

Solving
225 = 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.
225 + -1c2 = c2 + -1c2

Combine like terms: c2 + -1c2 = 0
225 + -1c2 = 0

Add '-225' to each side of the equation.
225 + -225 + -1c2 = 0 + -225

Combine like terms: 225 + -225 = 0
0 + -1c2 = 0 + -225
-1c2 = 0 + -225

Combine like terms: 0 + -225 = -225
-1c2 = -225

Divide each side by '-1'.
c2 = 225

Simplifying
c2 = 225

Take the square root of each side:
c = {-15, 15}