If P + 1/P = 5/2, then P² + 1/P² = 1. 25/4 2. 19/4 3. 9/4 4. 17/4

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If a + b = 12 and ab = 35, then (a − b)² =
2
4
16
20

If a + b = 16 and a − b = 2, then ab =
48
56
63
65