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Byju's Answer
Standard VIII
Mathematics
Expansion of (x^2 - y^2)
x+yx-yx2+y2 i...
Question
(
x
+
y
)
(
x
−
y
)
(
x
2
+
y
2
)
is equal to
.
A
x
3
−
y
3
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B
x
3
+
y
3
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C
x
4
+
y
4
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D
x
4
−
y
4
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Solution
The correct option is
D
x
4
−
y
4
(
x
+
y
)
(
x
−
y
)
(
x
2
+
y
2
)
=
(
x
2
−
y
2
)
(
x
2
+
y
2
)
[
∵
(
a
+
b
)
(
a
−
b
)
=
(
a
2
−
b
2
)
]
=
(
x
4
−
y
4
)