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-------- + --------- = -------------------------- (no 5)
x + 1 x - 1 (x + 1) (x - 1)
= 3x - 3 + 3x + 3
--------------------
( x +1) (x - 1)
= 3x + 3x -3 +3
-------------------
(x + 1) (x - 1)
= 6x
---------------
(x + 1) (x - 1)
x² + y² (no 7)
---------
x + y
----------------- = x² + y² (anggap dicoret maaf saya gabisa ngasih tanda dicoret)
x + y -----------
-- -- x + y
y x -----------------
x² + y² (anggap dicoret)
-------------
xy
= xy
-------
x + y