21*21+x*x=65*65

Solution for 21*21+x*x=65*65 equation:

Simplifying
21 * 21 + x * x = 65 * 65

Multiply 21 * 21
441 + x * x = 65 * 65

Multiply x * x
441 + x2 = 65 * 65

Multiply 65 * 65
441 + x2 = 4225

Solving
441 + x2 = 4225

Solving for variable 'x'.

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

Add '-441' to each side of the equation.
441 + -441 + x2 = 4225 + -441

Combine like terms: 441 + -441 = 0
0 + x2 = 4225 + -441
x2 = 4225 + -441

Combine like terms: 4225 + -441 = 3784
x2 = 3784

Simplifying
x2 = 3784

Take the square root of each side:
x = {-61.514225997, 61.514225997}