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Standard VIII
Mathematics
Algebraic Identities
Question
Evaluate
(
2
−
7
2
)
2
+
(
3
+
5
2
)
2
=
r
2
.
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Solution
Verified by Toppr
(
2
−
7
2
)
2
+
(
3
+
5
2
)
2
=
r
2
(
4
−
7
2
)
2
+
(
6
+
5
2
)
2
=
r
2
(
−
3
2
)
2
+
(
11
2
)
2
=
r
2
(
9
4
)
+
(
121
4
)
=
r
2
9
+
121
4
=
r
2
130
4
=
r
2
65
2
=
r
2
r
=
√
65
2
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2
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)
2
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(
3
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5
2
)
2
=
r
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.
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