Simplify and state any restrictions

Question

(9a+6b/a²-b²⁾ / (12a+8b/5a² )

 

its a fraction over a fraction

Answer 1

(9a-6b)/(a²-b²)  /( (12a+8b)/5a²)

 

= (3(3a+2b))/(a²+b²)) x ((5a²)/(4(3a+2b)))

=(3.5a²)/(4 (a²-b²))

=(15a² )/(4(a²-b²))  where a≠b ....ans