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Standard XII
Mathematics
Question
25
x
2
−
(
x
2
−
36
)
2
=_______
(
x
−
4
)
(
x
+
4
)
(
x
+
9
)
(
x
−
9
)
(
x
−
4
)
(
4
+
x
)
(
x
+
9
)
(
9
−
x
)
(
x
+
4
)
(
x
+
4
)
(
x
−
9
)
(
x
−
9
)
(
x
−
4
)
(
4
−
x
)
(
x
+
9
)
(
9
+
x
)
A
(
x
−
4
)
(
x
+
4
)
(
x
+
9
)
(
x
−
9
)
B
(
x
−
4
)
(
4
+
x
)
(
x
+
9
)
(
9
−
x
)
C
(
x
+
4
)
(
x
+
4
)
(
x
−
9
)
(
x
−
9
)
D
(
x
−
4
)
(
4
−
x
)
(
x
+
9
)
(
9
+
x
)
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Solution
Verified by Toppr
25
x
2
−
(
x
2
−
36
)
2
=
(
5
x
)
2
−
(
x
2
−
36
)
2
=
(
5
x
+
x
2
−
36
)
(
5
x
−
x
2
+
36
)
=
(
x
2
+
5
x
−
36
)
{
−
(
x
2
−
5
x
−
36
)
}
=
(
x
2
+
9
x
−
4
x
−
36
)
{
−
(
x
2
−
9
x
+
4
x
−
36
)
}
=
{
x
(
x
+
9
)
−
4
(
x
+
9
)
}
{
−
(
x
(
x
−
9
)
+
4
(
x
−
9
)
)
}
=
(
x
+
9
)
(
x
−
4
)
−
(
x
−
9
)
(
x
+
4
)
=
(
x
+
9
)
(
x
−
4
)
(
9
−
x
)
(
4
+
x
)
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