Question

How to simplify my answer

Answer 1

assuming that dot means multiply

remember

`((a)/(b))((c)/(d))=(ac)/(bd)`

so
remember that it is helpful to factor them to simplify


`((x-5)/(3x+12))((2x+8)/(2x-10))=`

`((x-5)(2x+8))/((3x+12)(2x-10))=`

`((x-5)(2)(x+4))/((3)(x+4)(2)(x-5))=`

`(((x-5)(2)(x+4))/((x-5)(2)(x+4)))((1)/(3))=`

`(1)((1)/(3)=`

`(1)/(3)`