a^2+12+(-864)=0

Solution for a^2+12+(-864)=0 equation:

Simplifying
a2 + 12 + (-864) = 0
a2 + 12 + -864 = 0

Reorder the terms:
12 + -864 + a2 = 0

Combine like terms: 12 + -864 = -852
-852 + a2 = 0

Solving
-852 + a2 = 0

Solving for variable 'a'.

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

Add '852' to each side of the equation.
-852 + 852 + a2 = 0 + 852

Combine like terms: -852 + 852 = 0
0 + a2 = 0 + 852
a2 = 0 + 852

Combine like terms: 0 + 852 = 852
a2 = 852

Simplifying
a2 = 852

Take the square root of each side:
a = {-29.189039039, 29.189039039}