Solve
Guides
Join / Login
Use app
Login
0
You visited us
0
times! Enjoying our articles?
Unlock Full Access!
Standard XII
Mathematics
Question
If
x
=
1
x
−
5
, find
x
2
−
1
x
2
.
±
5
√
2
9
±
5
√
2
2
±
5
√
1
4
±
5
√
1
3
A
±
5
√
2
9
B
±
5
√
2
2
C
±
5
√
1
3
D
±
5
√
1
4
Open in App
Solution
Verified by Toppr
x
=
1
x
−
5
=
>
1
x
=
x
−
5
=
>
x
−
1
x
=
5
Squaring both sides,
=
>
(
x
−
1
x
)
2
=
5
2
=
>
x
2
+
1
x
2
−
2
(
x
)
(
1
x
)
=
25
=
>
x
2
+
1
x
2
=
25
+
2
=
27
Now,
(
x
+
1
x
)
2
=
x
2
+
1
x
2
+
2
(
x
)
(
1
x
)
=
27
+
2
=
29
=
>
x
+
1
x
=
±
√
29
Again,
x
2
−
1
x
2
=
(
x
+
1
x
)
(
x
−
1
x
)
=
(
±
√
29
)
(
5
)
=
±
5
√
29
Was this answer helpful?
0
Similar Questions
Q1
If
x
=
1
x
−
5
and
x
≠
5
, find the value of
x
2
−
1
x
2
.
View Solution
Q2
x
3
+
x
2
−
x
+
22
if
x
=
5
1
−
2
i
View Solution
Q3
If
x
=
√
5
+
1
√
5
−
1
,
y
=
√
5
−
1
√
5
+
1
Find
x
2
+
x
y
+
y
2
.
View Solution
Q4
If
x
=
1
x
−
5
, find
x
2
−
1
x
2
.
View Solution
Q5
If
x
−
1
x
=
5
,
then find
x
2
−
1
x
2
.
View Solution