if a and B are the roots of equation x² - 5x+6=0.find 1)a²+B²
2)a/B+B/a
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a^2 + b^2= (a+b)^2 - 2ab
As sum of roots = a+b = ( - coefficient ofx)/( coefficient of x^2) = 5
ab = ( constant/coefficient of x) = 6
So it's 25 - 12 = 13
2) a/b + b/a
( a^2 + b^2)/ab = 13/6
As sum of roots = a+b = ( - coefficient ofx)/( coefficient of x^2) = 5
ab = ( constant/coefficient of x) = 6
So it's 25 - 12 = 13
2) a/b + b/a
( a^2 + b^2)/ab = 13/6
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