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If alpha, beta are the roots of the quad...

If `alpha, beta` are the roots of the quadratic equation `lx^(2) + mx + n = 0`,then evaluate the following expressions.
(a) `alpha^(2) + beta^(2)`
(b) `alpha/beta + beta/alpha`
(c ) `1/(alpha^(3)) + 1/(beta^(3))`

Text Solution

Verified by Experts

The correct Answer is:
(a) `(m^(2)-2ln)/(l^(2))`, (b) `(m^(2) - 2ln)/(ln)`, (c ) `(3lmn - m^(3))/(n^(3))`
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