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Byju's Answer
Standard X
Mathematics
GCD of Polynomials
Find the GCD ...
Question
Find the GCD of the following
x
2
+
3
x
y
+
2
y
2
,
x
2
+
5
x
y
+
6
y
2
A
x
+
2
y
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B
x
−
2
y
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C
2
x
+
2
y
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D
None of these
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Solution
The correct option is
D
x
+
2
y
We first factorize the given polynomials
x
2
+
3
x
y
+
2
y
2
and
x
2
+
5
x
y
+
6
y
2
as shown below:
x
2
+
3
x
y
+
2
y
2
=
x
2
+
x
y
+
2
x
y
+
2
y
2
=
x
(
x
+
y
)
+
2
y
(
x
+
y
)
=
(
x
+
y
)
(
x
+
2
y
)
x
2
+
5
x
y
+
6
y
2
=
x
2
+
2
x
y
+
3
x
y
+
6
y
2
=
x
(
x
+
2
y
)
+
3
y
(
x
+
2
y
)
=
(
x
+
3
y
)
(
x
+
2
y
)
The common factor of
x
2
+
3
x
y
+
2
y
2
and
x
2
+
5
x
y
+
6
y
2
is
(
x
+
2
y
)
, therefore, the GCD is
x
+
2
y
.
Hence, the greatest common divisor of
x
2
+
3
x
y
+
2
y
2
and
x
2
+
5
x
y
+
6
y
2
is
x
+
2
y
.
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Similar questions
Q.
The factors of x
2
+ 4y
2
+ 4y − 4xy − 2x − 8 are
(a) (x − 2y −4) (x − 2y + 2)
(b) (x − y + 2) (x − 4y − 4)
(c) (x + 2y − 4) (x + 2y + 2)
(d) none of these