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If x*y=sqrt(x^2+y^2) the value of (1*2 s...

If `x*y=sqrt(x^2+y^2)` the value of `(1*2 sqrt 2)(1*-2 sqrt 2)` is

A

(-7)

B

0

C

2

D

9

Text Solution

Verified by Experts

The correct Answer is:
D
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