12a^2-59-28=0

Solution for 12a^2-59-28=0 equation:

Simplifying
12a2 + -59 + -28 = 0

Reorder the terms:
-59 + -28 + 12a2 = 0

Combine like terms: -59 + -28 = -87
-87 + 12a2 = 0

Solving
-87 + 12a2 = 0

Solving for variable 'a'.

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

Add '87' to each side of the equation.
-87 + 87 + 12a2 = 0 + 87

Combine like terms: -87 + 87 = 0
0 + 12a2 = 0 + 87
12a2 = 0 + 87

Combine like terms: 0 + 87 = 87
12a2 = 87

Divide each side by '12'.
a2 = 7.25

Simplifying
a2 = 7.25

Take the square root of each side:
a = {-2.692582404, 2.692582404}