найти пределы функции lim стремится к 3 9-x^2/x^2-3x

−1−3x+39−1−3x+39−3x−x(2x)2+39−3x−x(2x)2+39−x2+39x2−3x−x2+39x2−3xx(−x2+39)x2−3x(−x2+39)x2−3−3x+1x2(−x2+39)−3x+1x2(−x2+39)−3x+1x(−2x2+78)−3x+1x(−2x2+78)−3x+1x2(−x2+39)−3x+1x2(−x2+39)−x2x2−3x+39−x2x2−3x+39−x3x2−3+39−x3x2−3+39−1−3x+39−1−3x+39−3x−2x+39−3x−2x+39−1−3x+39−1−3x+39−2xx2−3x+39−2xx2−3x+39−2x2x2−3+39−2x2x2−3+39−3x+39−2x−3x+39−2x−3x−4+39−3x−4+39−3x+39−2x−3x+39−2x−x2x2−3x+39−x2x2−3x+39−x3x2−3+39−x3x2−3+39−1−3x+39−1−3x+39−3x−2x+39