Answers edited by erinspoons
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Let
f
(
x
)
=
x
2
−
12
and
g
(
x
)
=
15
−
x
, how do you find
(
f
g
)
(
5
)
?
How do you solve
log
x
+
log
(
x
+
21
)
=
2
?
How do you simplify
(
x
−
2
+
3
i
)
(
x
−
2
−
3
i
)
?