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(450div30)^(2)-(12)^(2)=(?)^(2)...

`(450div30)^(2)-(12)^(2)=(?)^(2)`

A

`9^(2)`

B

`-9^(2)`

C

`sqrt(9)`

D

None of these

Text Solution

Verified by Experts

The correct Answer is:
D
`:'(?)^(2)=(450div30)^(2)-(12)^(2)=(15)^(2)-(12)^(2)`
`=225-144=81=(9)^(2)`
`:. ?=9`
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