MCQ
If the $\text{xy}=\sqrt{\text{x}^2+\text{y}^2}$ value of $[(1)(2\sqrt2)][(1)(-2\sqrt2)]$ is:
- ✓$9$
- B$0$
- C$-7$
- D$2$
✓
Answer
Correct option: A.
$9$
$9$
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