Hello, Please help with proof. a2 + b2 = 25 a b =5, then a over b + b over a =?? I know the answer is 5 but can't find the proof..(The book says it is 5 without proof)
ab = 5
a/b + b/a = ?
So, getting rid of the denominator, (a/b + b/a) * ab = a2+b2
so a2+b2 / ab = ?
25/5 = \(5\)