42*42+40*40=x*x

Solution for 42*42+40*40=x*x equation:

Simplifying
42 * 42 + 40 * 40 = x * x

Multiply 42 * 42
1764 + 40 * 40 = x * x

Multiply 40 * 40
1764 + 1600 = x * x

Combine like terms: 1764 + 1600 = 3364
3364 = x * x

Multiply x * x
3364 = x2

Solving
3364 = x2

Solving for variable 'x'.

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

Add '-1x2' to each side of the equation.
3364 + -1x2 = x2 + -1x2

Combine like terms: x2 + -1x2 = 0
3364 + -1x2 = 0

Add '-3364' to each side of the equation.
3364 + -3364 + -1x2 = 0 + -3364

Combine like terms: 3364 + -3364 = 0
0 + -1x2 = 0 + -3364
-1x2 = 0 + -3364

Combine like terms: 0 + -3364 = -3364
-1x2 = -3364

Divide each side by '-1'.
x2 = 3364

Simplifying
x2 = 3364

Take the square root of each side:
x = {-58, 58}