Expand.
(
9
5
a
−
6
)
(
9
5
a
+
6
)
=
\displaystyle {\left(\frac{{9}}{{5}}{a}-{6}\right)}{\left(\frac{{9}}{{5}}{a}+{6}\right)}=
(
5
9
a
−
6
)
(
5
9
a
+
6
)
=
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Question 6
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\displaystyle
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