3y^2-12=0

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

Simplifying
3y2 + -12 = 0

Reorder the terms:
-12 + 3y2 = 0

Solving
-12 + 3y2 = 0

Solving for variable 'y'.

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

Add '12' to each side of the equation.
-12 + 12 + 3y2 = 0 + 12

Combine like terms: -12 + 12 = 0
0 + 3y2 = 0 + 12
3y2 = 0 + 12

Combine like terms: 0 + 12 = 12
3y2 = 12

Divide each side by '3'.
y2 = 4

Simplifying
y2 = 4

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