Question

помогите пожалуйста 20 б. !

Answer 1

(xˇ2-9)/(10-3x) . (2/(x-4) - 4x/(xˇ2-x-12) - 1/(x+3)=
=(xˇ2-9)/(10-3x) . (2x+6-4x-x+4)/(x-4)(x+3)=
=(x+3)(x-3)/(10-3x) .(-3x+10)/(x-4)(x+3)=
=(x-3)/(x-4)