(2a-3)(2a+3)=0

Solution for (2a-3)(2a+3)=0 equation:

Simplifying
(2a + -3)(2a + 3) = 0

Reorder the terms:
(-3 + 2a)(2a + 3) = 0

Reorder the terms:
(-3 + 2a)(3 + 2a) = 0

Multiply (-3 + 2a) * (3 + 2a)
(-3(3 + 2a) + 2a * (3 + 2a)) = 0
((3 * -3 + 2a * -3) + 2a * (3 + 2a)) = 0
((-9 + -6a) + 2a * (3 + 2a)) = 0
(-9 + -6a + (3 * 2a + 2a * 2a)) = 0
(-9 + -6a + (6a + 4a2)) = 0

Combine like terms: -6a + 6a = 0
(-9 + 0 + 4a2) = 0
(-9 + 4a2) = 0

Solving
-9 + 4a2 = 0

Solving for variable 'a'.

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

Add '9' to each side of the equation.
-9 + 9 + 4a2 = 0 + 9

Combine like terms: -9 + 9 = 0
0 + 4a2 = 0 + 9
4a2 = 0 + 9

Combine like terms: 0 + 9 = 9
4a2 = 9

Divide each side by '4'.
a2 = 2.25

Simplifying
a2 = 2.25

Take the square root of each side:
a = {-1.5, 1.5}