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 b=c d` (b) `a d=b c` (c) `a d=sqrt(b c)` `a b=sqrt(c d)`

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

If a

If a

(a+ b + c- d)^2-(a-b-c+d)^2 =?

If c!=0 and the equation p/(2x)=a/(x+c)+b/(x-c) has two equal roots,then p can be (sqrt(a)-sqrt(b))^(2) b.(sqrt(a)+sqrt(b))^(2) c.a+b d.a-b

The value of c for which the equation a x^2+2b x+c=0 has equal roots is (b^2)/a (b) (b^2)/(4a) (c) (a^2)/b (d) (a^2)/(4b)

If a+b+c+d=0 then (a+d)^(2)+(b+d)^(2)+(c+d)^(2) is equal to

If a,b,c are positive rational numbers such that agtbgtc and the quadratic eqution (a+b-2c)x^2+(b+c-2a)x+(c+a-2b)=0 has a root of the interval (-1,0) then (A) c+alt2b (B) the roots of the equation are rational (C) the roots of are imaginary (D) none of these