21*21+36*36=c^2

Solution for 21*21+36*36=c^2 equation:

Simplifying
21 * 21 + 36 * 36 = c2

Multiply 21 * 21
441 + 36 * 36 = c2

Multiply 36 * 36
441 + 1296 = c2

Combine like terms: 441 + 1296 = 1737
1737 = c2

Solving
1737 = 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.
1737 + -1c2 = c2 + -1c2

Combine like terms: c2 + -1c2 = 0
1737 + -1c2 = 0

Add '-1737' to each side of the equation.
1737 + -1737 + -1c2 = 0 + -1737

Combine like terms: 1737 + -1737 = 0
0 + -1c2 = 0 + -1737
-1c2 = 0 + -1737

Combine like terms: 0 + -1737 = -1737
-1c2 = -1737

Divide each side by '-1'.
c2 = 1737

Simplifying
c2 = 1737

Take the square root of each side:
c = {-41.677331968, 41.677331968}