9a^2-16=

Solution for 9a^2-16= equation:

Simplifying
9a2 + -16 = 0

Reorder the terms:
-16 + 9a2 = 0

Solving
-16 + 9a2 = 0

Solving for variable 'a'.

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

Add '16' to each side of the equation.
-16 + 16 + 9a2 = 0 + 16

Combine like terms: -16 + 16 = 0
0 + 9a2 = 0 + 16
9a2 = 0 + 16

Combine like terms: 0 + 16 = 16
9a2 = 16

Divide each side by '9'.
a2 = 1.777777778

Simplifying
a2 = 1.777777778

Take the square root of each side:
a = {-1.333333333, 1.333333333}