Question

Упростите выражение 
(х^2-9)/(10-3х)*((2/(х-4)-4х/(х^2-х-12)-1/(х+3))

Answer 1

 x^2-9/10-6 - 12x-12/x - 3x^2 - 36x - 3 +9x = -2x^2 - (-18 x) - 12/x -21/10= -2x^2+18 x -12/x -21/10