49/64x^2 - 2xy + 64/49y^2
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Answer:
49-64x^2
49
−
64
x
2
Rewrite
49
as
7
2
.
7
2
−
64
x
2
Rewrite
64
x
2
as
(
8
x
)
2
.
7
2
−
(
8
x
)
2
Since both terms are perfect squares, factor using the difference of squares formula,
a
2
−
b
2
=
(
a
+
b
)
(
a
−
b
)
where
a
=
7
and
b
=
8
x
.
(
7
+
8
x
)
(
7
−
(
8
x
)
)
Multiply
8
by
−
1
.
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