Answer: 69
Step-by-step explanation: a + b = 9 and ab = 6
a² + b² = ?
Soo... Lets use the formula (a + b)²
(a + b)² = a² + b² + 2ab
9² = a² + b² + 2(6)
81 = a² + b² + 12
81 - 12 = a² + b²
69 = a² + b²
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