P+3 3-p (p+3)(6+2p) +(3-p)(6-2p) 6p+18+2p²+6p+18-6p-6p+2p²
------ + ------- = ------------------------------------ = ------------------------------------------ 6-2p 6+2p (6-2p)(6+2p) 36-4p²
4p²+36 ( 4p²+36)*2*(p²-9) 8p⁴+72p²-72p²-648 8(p⁴-81)
=------------ ; ------------------------ = --------------------------- = -------------------- =
36-4p² (36-4p²)(p²+9) (36-4p²)(p²+9) (36-4p²)(p²+9)
=8(p²-9)(p²+9)/(36-4p²)(p²+9)=8(p²-9)/(36-4p²)=8(p²-9)/4(9-p²)= -2