(2-ab)(2+ab)=

Solution for (2-ab)(2+ab)= equation:

Simplifying
(2 + -1ab)(2 + ab) = 0

Multiply (2 + -1ab) * (2 + ab)
(2(2 + ab) + -1ab * (2 + ab)) = 0
((2 * 2 + ab * 2) + -1ab * (2 + ab)) = 0
((4 + 2ab) + -1ab * (2 + ab)) = 0
(4 + 2ab + (2 * -1ab + ab * -1ab)) = 0
(4 + 2ab + (-2ab + -1a2b2)) = 0

Combine like terms: 2ab + -2ab = 0
(4 + 0 + -1a2b2) = 0
(4 + -1a2b2) = 0

Solving
4 + -1a2b2 = 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 + -1a2b2 = 0 + -4

Combine like terms: 4 + -4 = 0
0 + -1a2b2 = 0 + -4
-1a2b2 = 0 + -4

Combine like terms: 0 + -4 = -4
-1a2b2 = -4

Divide each side by '-1b2'.
a2 = 4b-2

Simplifying
a2 = 4b-2

Take the square root of each side:
a = {-2b-1, 2b-1}