Question

нужна помощь!
1) 2/ x²-9 + 1/ x+3
2)2x/ x-4 - 5x-2/ x²-16

Answer 1

1)
          2
=-------------- +1/х+3=
(х-3)(х+3)
    2+х-3
=---------------=(х-1)/(х²-9)
  х²-9

2)
      2х
=---------- - (5х-2)/(х-4)(х+4)=
    х-4
  2х(х+4)-5х+2
=----------------=
   (х-4)(х+4)
  2х²+8х-5х+2
=----------------=
   х²-16
    2х²+3х+2
=----------------
х²-16