$\displaystyle s+9/((s^2)-14s+49)$ can be factored as (s+9)/(s-7)(s-7)..

however i could not write that as partial fractions such that

$\displaystyle (s+9)/(s-7)^2=A(s-7)+B(s-7)$

I do not know how to get A and B... plz someone help me approach this type of problem