Evaluate The Limit if It exists

Question

lim x→36

(6 - x) / (36x-x^2)

Answer 1

(6-√x)/(36x-x²)=(6-√x)/(x(36-x))=(6-√x)/(x(6-√x)(6+√x))=1/(x(6+√x)) which as as x goes to 36

is equal to 1/((36)(12))=1/432