9x^2-a^2=0

Solution for 9x^2-a^2=0 equation:

Simplifying
9x2 + -1a2 = 0

Reorder the terms:
-1a2 + 9x2 = 0

Solving
-1a2 + 9x2 = 0

Solving for variable 'a'.

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

Add '-9x2' to each side of the equation.
-1a2 + 9x2 + -9x2 = 0 + -9x2

Combine like terms: 9x2 + -9x2 = 0
-1a2 + 0 = 0 + -9x2
-1a2 = 0 + -9x2
Remove the zero:
-1a2 = -9x2

Divide each side by '-1'.
a2 = 9x2

Simplifying
a2 = 9x2

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