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If 3A=[-1-2-2 2 1-2x-2y] such that AA^T=...

If `3A=[-1-2-2 2 1-2x-2y]` such that `AA^T=I` , then which of the following are correct? `x+2y=4` (b) `x-y=1` `x^2+y^2=-3` (d) `x^2+y^2=5`

A

`-3`

B

`-2`

C

`-1`

D

0

Text Solution

Verified by Experts

The correct Answer is:
A
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