(3a-3b)(3a+3b)=

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

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

Multiply (3a + -3b) * (3a + 3b)
(3a * (3a + 3b) + -3b * (3a + 3b)) = 0
((3a * 3a + 3b * 3a) + -3b * (3a + 3b)) = 0

Reorder the terms:
((9ab + 9a2) + -3b * (3a + 3b)) = 0
((9ab + 9a2) + -3b * (3a + 3b)) = 0
(9ab + 9a2 + (3a * -3b + 3b * -3b)) = 0
(9ab + 9a2 + (-9ab + -9b2)) = 0

Reorder the terms:
(9ab + -9ab + 9a2 + -9b2) = 0

Combine like terms: 9ab + -9ab = 0
(0 + 9a2 + -9b2) = 0
(9a2 + -9b2) = 0

Solving
9a2 + -9b2 = 0

Solving for variable 'a'.

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

Add '9b2' to each side of the equation.
9a2 + -9b2 + 9b2 = 0 + 9b2

Combine like terms: -9b2 + 9b2 = 0
9a2 + 0 = 0 + 9b2
9a2 = 0 + 9b2
Remove the zero:
9a2 = 9b2

Divide each side by '9'.
a2 = b2

Simplifying
a2 = b2

Take the square root of each side:
a = {-1b, b}