(m-3)x^2-2(3m-4)x+7m-6=0
-m+3x^2+2(3m-4)x-7m+6=0
-m+3x^2+6mx-8x-7m+6=0
-8+3x^2+6m x-8x+6=0
-8+3x^2+(6m-8)x+6=0
3x^2+(6m-8)x-8m+6=0
D=(6m-8)^2-4×3(-8+6m)
D=36m^2-8
{ m € ( - infinit , - rad 2/3) U (rad 2/3 , + infinit )
{ m1 =-rad2/3, m2=rad 2/3
{ m € (-rad 2/3, rad 2/3)
