How do you find the scale factor between shape b and shape a ?

I think this is what your looking and asking for 

The scale factor of figure A to B is: ( 50*50=2,500)( 50*15)= 750
The scale factor of figure B to A is: (30*30=900) (30*18)=540

Answerthe simplified expression isexplanationthe given expression is,let us deal with the bracket first.the two negatives in the parenthesis will become positive.the expression now becomes,we now expand the parenthesis to get,we group like terms to obtain,this simplifies to,

Its d so thats how it would would back from 1.0 form three four two