a*a+504*504=520*520

Solution for a*a+504*504=520*520 equation:

Simplifying
a * a + 504 * 504 = 520 * 520

Multiply a * a
a2 + 504 * 504 = 520 * 520

Multiply 504 * 504
a2 + 254016 = 520 * 520

Reorder the terms:
254016 + a2 = 520 * 520

Multiply 520 * 520
254016 + a2 = 270400

Solving
254016 + a2 = 270400

Solving for variable 'a'.

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

Add '-254016' to each side of the equation.
254016 + -254016 + a2 = 270400 + -254016

Combine like terms: 254016 + -254016 = 0
0 + a2 = 270400 + -254016
a2 = 270400 + -254016

Combine like terms: 270400 + -254016 = 16384
a2 = 16384

Simplifying
a2 = 16384

Take the square root of each side:
a = {-128, 128}