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Byju's Answer
Standard IX
Mathematics
Surds
Which of the ...
Question
Which of the following is not a surd?
A
√
45
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B
√
20
×
√
45
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C
3
√
4
÷
√
3
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D
3
√
12
+
7
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Solution
The correct option is
A
√
20
×
√
45
A.
√
45
=
√
9
×
5
=
3
√
5
B.
√
20
×
√
45
=
√
5
×
4
×
√
9
×
5
=
2
√
5
×
3
√
5
=
6
×
5
=
30
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Q.
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