Answer :
f(x)=25-x^2 and g(x)=x+5
(f/g) (x)=(25-x^2 )/(x+5)
25-x^2=(5-x)(5+x)
(f/g) (x)=(5-x)(5+x)/(x+5)
cancle out x+5
(f/g) (x)=(5-x)
(f/g) (x)=(25-x^2 )/(x+5)
25-x^2=(5-x)(5+x)
(f/g) (x)=(5-x)(5+x)/(x+5)
cancle out x+5
(f/g) (x)=(5-x)