bentuk sederhana dari 6/a-2 : a-9/a

[tex] \frac{6}{a-2} : \frac{a-9}{a} \\ = \frac{6}{a-2} * \frac{a}{a-9} \\ = \frac{6a}{a^2 - 11a + 18} [/tex]

b. a
--- x --------
a-2. a-9
axb
-------
(a-2)(a-9)
ab
-----
a²-11a+9