Question

If a-b = 7and ab =9 then a square +b square = ?

Answer 1

Answer:

Answer is 67.....!!!!

Step-by-step explanation:

First,

(a-b)²= a²-2ab+b²

(7)² = a²+b²-2(9)

49 = a²+b²-18

49+18 = a²+b²

67 = a²+b²

a²+b² = 67