a*a*12*12=13*13

Solution for a*a*12*12=13*13 equation:

Simplifying
a * a * 12 * 12 = 13 * 13

Reorder the terms for easier multiplication:
12 * 12a * a = 13 * 13

Multiply 12 * 12
144a * a = 13 * 13

Multiply a * a
144a2 = 13 * 13

Multiply 13 * 13
144a2 = 169

Solving
144a2 = 169

Solving for variable 'a'.

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

Divide each side by '144'.
a2 = 1.173611111

Simplifying
a2 = 1.173611111

Take the square root of each side:
a = {-1.083333333, 1.083333333}