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The roots of the equation z4+az3+(12+9i)z2+bz=0 (where a and b are complex numbers ) are the vertices of a square, then the value of |a|2 is

Answer» The roots of the equation z4+az3+(12+9i)z2+bz=0 (where a and b are complex numbers ) are the vertices of a square, then the value of |a|2 is


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