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Q=7 how to solve???? ???....... .......................

Q=7 how to solve???? ???....... ....................... 

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1 Answers

Aditya Gupta
2081 Points
3 years ago
let the roots be t, t, p, p
now use formulas for sum of roots taken r at a time.
so we have t+t+p+p= 2(t+p)= – 4b/a
or t+p= – 2b/a
t*t*p*p= (tp)^2= e/a
and t^2p+t^2p+tp^2+tp^2= 2tp(t+p)= – 4d/a or tp(b/a)= d/a or tpb=d. now squaring b^2*(tp)^2=d^2
or b^2*e/a= d^2
or d^2a/eb^2= 1
kindly approve :)

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