limlimitsxto3(x3+x2−12xx2−9)=limlimitsxto3(x3−3x2+4x2−12x(x−3)(x+3)
limlimitsxto3((x2+4x)(x−3)(x−3)(x+3)=limlimitsxto3(x2+4xx+3)
=32+4(3)3+3=216=72