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Byju's Answer
Other
Quantitative Aptitude
HCF and LCM
Find the HCF ...
Question
Find the HCF of the following:
12. x
2
- xy + yz - zx, y
2
- xy - yz +xz
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Solution
Let
p
x
=
x
2
-
xy
+
yz
-
zx
=
x
x
-
y
+
z
y
-
x
=
x
x
-
y
-
z
x
-
y
=
x
-
z
x
-
y
Let
q
x
=
y
2
-
xy
-
yz
+
zx
=
y
y
-
x
-
z
y
-
x
=
y
-
z
y
-
x
=
z
-
y
x
-
y
HCF
of
p
x
and
q
x
=
x
-
y
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0
Similar questions
Q.
Solve the following equations:
x
2
+
x
y
+
x
z
=
18
,
y
2
+
y
z
+
y
z
+
12
=
0
z
2
+
z
x
+
z
y
=
30
.
Q.
Solve the following equations :
x
2
+
x
y
+
x
z
=
18
,
y
2
+
y
z
+
y
x
+
12
=
0
,
z
2
+
z
x
+
z
y
=
30.
Q.
The L.C.M of
x
y
+
y
z
+
z
x
+
y
2
and
x
2
+
x
y
+
y
z
+
z
x
is
Q.
Find
x
2
+
y
2
+
z
2
if
x
2
+
x
y
+
x
z
=
135
,
y
2
+
y
z
+
y
x
=
351
and
z
2
+
z
x
+
z
y
=
243
.
Q.
If
x
2
+
x
y
+
x
z
=
135
,
y
2
+
y
z
+
x
y
=
351
and
z
2
+
x
z
+
y
z
=
243
, then
x
2
+
y
2
+
z
2
=
?
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