Answer:
Step-by-step explanation:
81
=
3
4
and
27
, so this equation can also be written as
x
(
+
2
)
6
.
Since the bases are now the same, we can equate exponents to get
so that
(technically this equating of exponents requires the fact that exponential functions (with base not equal to 1) are one-to-one functions).
(do u understand?)