MCQOPTIONS
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| 1. |
x and y are positive integers. If x4 + y4 + x2y2 = 481 and xy = 12, then what is the value of x2 – xy + y2? |
| A. | 16 |
| B. | 13 |
| C. | 11 |
| D. | 15 |
| Answer» C. 11 | |