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Byju's Answer
Standard VIII
Mathematics
Factorisation by Regrouping Terms
Solve : x2 ...
Question
Solve :
(
x
2
−
y
2
)
×
(
x
+
2
y
)
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Solution
Let us multiply the given binomials
(
x
2
−
y
2
)
and
(
x
+
2
y
)
as shown below:
(
x
2
−
y
2
)
(
x
+
2
y
)
=
x
2
(
x
+
2
y
)
−
y
2
(
x
+
2
y
)
=
(
x
2
×
x
)
+
(
x
2
×
2
y
)
−
(
y
2
×
x
)
−
(
y
2
×
2
y
)
=
x
3
+
2
x
2
y
−
x
y
2
−
2
y
3
Hence,
(
x
2
−
y
2
)
×
(
x
+
2
y
)
=
x
3
+
2
x
2
y
−
x
y
2
−
2
y
3
.
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