Question

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

Answer 1

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


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