Doubt from complex numbers

Question no 4

1 is always a root of the equation

1 Like

Yes correct ya but inke solution me confused ho gaya they have assumed as z=1+i but couldn't understand how they got a because i got ai=2i-1, they got a=2+i

Is this in jee syllabus? Multiplication and divison of complex numbers in polar form ?

ha,yes

Ok thanks