4 Maths -- Quadratic Equations

If the roots of equation lx^2 + nx + n = 0  be in ration p:q  prove that  {\displaystyle {\sqrt {~^{~}}}}p/q +  q/p + n/l  = 0

If the roots of equation lx^2 + nx + n = 0  be in ration p:q  prove that 

 p/q +  q/p + n/l  = 0


Soln:

Let the roots be pα and qα.

Then, pα + qα = –n/l and pα.qα = n/l  

Now,

(pα+qα)/√pα.qα = –(n/l)/(√n/l)

Or, α(p+q)/α(√pq) = –(√n/l)

Or, p/√pq + q/√pq = –(√n/l)

Or, √p2/√pq + √q2/√pq+ √n/l = 0

So, √p/q + √q/p + √n/l = 0

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