" 3.If the equation "(a^(2)+b^(2))x^(2)-2(ac+bd)x+c^(2)+d^(2)=0" has equal roots then "

If the equation (a^(2)+b^(2))x^(2)-2(ac+bd)x+(c^(2)+d^(2))=0 has equal roots, then which one of the following is correct?

If the equation (a^(2)+b^(2))x^(2)-2(ac+bd)x+c^(2)+d^(2)=0 has equal roots,then (a)ab=cd(b)ad=bc (c) ad=sqrt(bc)ab=sqrt(cd)

If (a^(2)+b^(2))x^(2)+2(ab+bd)x+c^(2)+d^(2)=0 has real roots then

If the roots of the equation (a^(2)+^(2))x^(2)-2(ac+bd)x+(c^(2)+d^(2))=0 are equal , prove that (a)/(b)=(c )/(d)

If the roots of the equation (a^(2) + b^(2))x^(2) - 2(ac + bd) x + (c^(2) + d^(2)) = 0 are equal prove that (a)/(b) = (c )/(d)

If the roots of the equation (a^(2)+b^(2))x^(2)-2(ac+bd)x+(c^(2)+d^(2))=0 are equal,prove that (a)/(b)=(c)/(d)

If the equation (b^2 + c^2) x^2 -2 (a+b) cx + (c^2 + a^2) = 0 has equal roots, then

If the equation (a^2+b^2)x^2-2(a c+b d)x+c^2+d^2=0 has equal roots, then (a) a b=c d (b) a d=b c (c) a d=sqrt(b c) (d) a b=sqrt(c d)

The equation (a^(2)+b^(2))x^(2)-2b(a+c)x+(b^(2)+c^(2))=0 has equal roots. Which one of the following is correct about a,b and c ?