

MCQOPTIONS
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1. |
Find the value of \[{{x}^{2}}+{{y}^{2}}+{{z}^{2}}-xy-zy-zx\] when \[x=-3,\text{ }y=4\]and \[z=-2\]. |
A. | 75 |
B. | 68 |
C. | 43 |
D. | 54 |
Answer» D. 54 | |