27x squared minus 3y squared factoriset
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Answered by
0
Answer:
Step-by-step explanation:
take out a
common factor
3
=
3
(
9
x
2
−
1
)
9
x
2
−
1
is a
difference of squares
∙
x
a
2
−
b
2
=
(
a
−
b
)
(
a
+
b
)
here
9
x
2
=
(
3
x
)
2
⇒
a
=
3
x
and
b
=
1
⇒
9
x
2
−
1
=
(
3
x
−
1
)
(
3
x
+
1
)
⇒
27
x
2
−
1
=
3
(
3
x
−
1
)
(
3
x
+
1
)
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