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Byju's Answer
Standard VIII
Mathematics
Application of Identity: ( x + y )( x - y )
The value of ...
Question
The value of
9.8
×
10.2
will be
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Solution
9.8
×
10.2
=
(
10
−
0.2
)
(
10
+
0.2
)
Applying the formula
(
a
+
b
)
(
a
−
b
)
=
(
a
2
−
b
2
)
⇒
9.8
×
10.2
=
(
10
2
−
(
0.2
)
2
)
⇒
9.8
×
10.2
=
(
100
−
0.04
)
=
99.96.
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Standard VIII Mathematics
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