-a(-a)3=180

Solution for -a(-a)3=180 equation:

Simplifying
-1a(-1a) * 3 = 180

Remove parenthesis around (-1a)
-1a * -1a * 3 = 180

Reorder the terms for easier multiplication:
-1 * -1 * 3a * a = 180

Multiply -1 * -1
1 * 3a * a = 180

Multiply 1 * 3
3a * a = 180

Multiply a * a
3a2 = 180

Solving
3a2 = 180

Solving for variable 'a'.

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

Divide each side by '3'.
a2 = 60

Simplifying
a2 = 60

Take the square root of each side:
a = {-7.745966692, 7.745966692}