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Introduction to Determinants
Question
|
x
+
y
0
0
0
x
−
y
0
0
0
x
2
+
y
2
|
=
Easy
A
x
4
–
y
4
B
x
4
+
y
4
C
x
9
–
y
8
D
x
6
–
y
6
Solution
|
x
+
y
0
0
0
x
−
y
0
0
0
x
2
+
y
2
|
=
(
x
+
y
)
(
x
−
y
)
(
x
2
+
y
2
)
=
x
4
−
y
4
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