3a^2-12=0

Solution for 3a^2-12=0 equation:

Simplifying
3a2 + -12 = 0

Reorder the terms:
-12 + 3a2 = 0

Solving
-12 + 3a2 = 0

Solving for variable 'a'.

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

Add '12' to each side of the equation.
-12 + 12 + 3a2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 3a2 = 0 + 12
3a2 = 0 + 12

Combine like terms: 0 + 12 = 12
3a2 = 12

Divide each side by '3'.
a2 = 4

Simplifying
a2 = 4

Take the square root of each side:
a = {-2, 2}