Find the following using suitable identity
(5.2)²?
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Answer:
5.2
2
=(5+0.2)
2
is of the form (a+b)
2
=a
2
+b
2
+2ab
where a=5,b=0.2
∴5.2
2
=(5+0.2)
2
=5
2
+0.2
2
+2×5×0.2
=25+0.04+2=27.04
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