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

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

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

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

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

Solving
4 + -9a2 = 0

Solving for variable 'a'.

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

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

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

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

Divide each side by '-9'.
a2 = 0.4444444444

Simplifying
a2 = 0.4444444444

Take the square root of each side:
a = {-0.666666667, 0.666666667}