lim =3, x^2-2x-3/x-3
lim x →3 [ x^2 - 2x - 3 ] / [ x -3 ] factor the numerator
lim x → 3 [ (x + 1) (x - 3) / [ x - 3 ]
lim x → 3 x + 1 = 4
\(\lim_{x\rightarrow 3}x^2-2x-3/x-3=(x-3)(x+1)/(x-3)=(x+1)/1=4\)
