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Byju's Answer
Standard IX
Mathematics
Expansion of (a ± b ± c)²
The sum of a ...
Question
The sum of a number and its positive square root is
6
25
. The number is :
A
5
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B
1
5
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C
25
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D
1
25
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Solution
The correct option is
D
1
25
Let the number be
x
.
x
+
√
x
=
6
25
⇒
√
x
=
6
25
−
x
Now, squaring on the both sides, we get
x
=
36
625
+
x
2
−
12
x
25
∴
x
2
−
37
x
25
+
36
625
=
0
∴
x
=
36
25
,
1
25
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3
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