(a^2+3)=12

Solution for (a^2+3)=12 equation:

Simplifying
(a2 + 3) = 12

Reorder the terms:
(3 + a2) = 12

Remove parenthesis around (3 + a2)
3 + a2 = 12

Solving
3 + a2 = 12

Solving for variable 'a'.

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

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

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

Combine like terms: 12 + -3 = 9
a2 = 9

Simplifying
a2 = 9

Take the square root of each side:
a = {-3, 3}