2b/b kuadrat -9 : 8b+8ab/b-3

(2b / b²-9 ) ÷ (8b+8ab / b-3)

= (2b) × (b - 3)
---------------------------
(b²-9) × (8b + 8ab)

= (b - 3) × (2b)
-----------------------------------
(b - 3)(b + 3) × (2b)(4 + 4a)

= 1
-----------------------
(b + 3)(4 + 4a)

= 1
----------------------
4b + 12 + 4ab + 12a

= 1
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4b(1 + a) + 12(1 + a)