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Standard VIII
Mathematics
Question
State whether True or False
The square of
√
5
−
2
is
9
−
4
√
5
Open in App
Solution
Verified by Toppr
By using formula
(
a
−
b
)
2
=
a
2
−
2
a
b
+
b
2
, we get
∴
(
√
5
−
2
)
2
=
(
√
5
2
)
−
2
(
√
5
)
(
2
)
+
(
2
)
2
=
5
−
4
(
√
5
)
+
4
=
9
−
4
(
√
5
)
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State whether True or False
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−
2
is
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4
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