Question

4. If a - b = 5 and ab = 12, find the value of a +b?​

Answer 1

Answer:

$(a - b {)}^{2} = {a}^{2} + {b}^{2} - 2ab \\ {5}^{2} = {a }^{2} + {b}^{2} - 2(12) \\ {a}^{2} + {b}^{2} = 25 + 24 = 49$