121x2 + 330xy + 225y2
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Answered by
1
Answer:
121x2 + 330xy + 225y2 = 242x + 330xy + 450y
Answered by
1
121
x
2
−
225
y
2
Rewrite
121
x
2
as
(
11
x
)
2
.
(
11
x
)
2
−
225
y
2
Rewrite
225
y
2
as
(
15
y
)
2
.
(
11
x
)
2
−
(
15
y
)
2
Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
11
x
and
b
=
15
y
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