5a^2-15=

Solution for 5a^2-15= equation:

Simplifying
5a2 + -15 = 0

Reorder the terms:
-15 + 5a2 = 0

Solving
-15 + 5a2 = 0

Solving for variable 'a'.

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

Add '15' to each side of the equation.
-15 + 15 + 5a2 = 0 + 15

Combine like terms: -15 + 15 = 0
0 + 5a2 = 0 + 15
5a2 = 0 + 15

Combine like terms: 0 + 15 = 15
5a2 = 15

Divide each side by '5'.
a2 = 3

Simplifying
a2 = 3

Take the square root of each side:
a = {-1.732050808, 1.732050808}