find a \delta such that for the given value of L and \varepsilon in the statement \midf(x)-L\mid\le\varepsilon whenever 0\le\midx-a\mid\le\delta

given that f(x)=(x^2-9)/(x+3) a=3, L=-6 and \varepsilon=0.005

pls am sorry i can't get the formatting of the question right, kindly help on solving this. thanks!