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x^2 - 5x +6 =0
a^2 + b^2 = ( a+b)^2 -2 ab
As sum of roots (a+b)= 5
product of roots ( ab)= 6
So (5)^2 -2(6) = 25 -12 = 13
Now a/b + b/a = a^2 + b^2)/ab = 13/6
a^2 + b^2 = ( a+b)^2 -2 ab
As sum of roots (a+b)= 5
product of roots ( ab)= 6
So (5)^2 -2(6) = 25 -12 = 13
Now a/b + b/a = a^2 + b^2)/ab = 13/6
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