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Byju's Answer
Standard VIII
Mathematics
Multiplication of Monomials
SolveIf x =...
Question
Solve
If
x
=
3
+
√
8
, find
x
2
−
1
x
2
Open in App
Solution
x
=
3
+
√
8
1
x
=
1
3
+
√
8
×
3
−
√
8
3
−
√
8
=
3
−
√
8
9
−
8
=
3
−
√
8
x
+
1
x
=
3
+
√
8
+
3
−
√
8
=
6
x
−
1
x
=
3
+
√
8
−
3
+
√
8
=
2
√
8
x
2
−
1
x
2
=
(
x
+
1
x
)
(
x
−
1
x
)
=
(
6
)
×
(
2
√
8
)
=
12
√
8
=
24
√
2
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0
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