Question

If a+b=7and ab=12 find the value of a²+b²​

Answer 1

Answer:

$(a + {b})^{2} = {a}^{2} + {b}^{2} + 2ab \\ {7}^{2} = { {a}^{2} + b}^{2} + 2(12) \\ {a}^{2} + {b}^{2} = 49 - 24 = 25$

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