If all the roots of the equation `z^4 +az^3 + bz^2+cz+d=0` `(a,b,c,d in RR)` are of unit modulus,then

If all the roots of the equation z^(4)+az^(3)+bz^(2)+cz+d=0(a,b,c,d in R) are of unit modulus,then

For a complex number Z, if all the roots of the equation Z^3 + aZ^2 + bZ + c = 0 are unit modulus, then

For a complex number Z, if all the roots of the equation Z^3 + aZ^2 + bZ + c = 0 are unimodular, then

If 2 and i are two roots of the equation 2z^4+az^3+bz^2+cz+3=0,where a,b,c inR, then the value of -2a/11 is

The roots of the equation z^(4) + az^(3) + (12 + 9i)z^(2) + bz = 0 (where a and b are complex numbers) are the vertices of a square. Then The value of |a-b| is

The roots of the equation z^(4) + az^(3) + (12 + 9i)z^(2) + bz = 0 (where a and b are complex numbers) are the vertices of a square. Then The value of |a-b| is

The roots of the equation z^(4) + az^(3) + (12 + 9i)z^(2) + bz = 0 (where a and b are complex numbers) are the vertices of a square. Then The area of the square is

The roots of the equation z^(4) + az^(3) + (12 + 9i)z^(2) + bz = 0 (where a and b are complex numbers) are the vertices of a square. Then The area of the square is

If a, b in C and z is a non zero complex number then the root of the equation az^3 + bz^2 + bar(b) z + bar(a)=0 lie on

If roots of the equation z^(2)+az+b=0 are purely imaginary then