If z = a + ib where a and b are less than zero. Conjugate of z lies on which quadrant in Argand plane.
II
z = a + ib (-, -)
Where a < 0, b < 0
z will lie in third quadrant.
So, conjugate of z = a - ib (-, +)
Since, a and b are less than zero. Negative of 'b' becomes positive.
In conjugate of z (-, +) a<0 and b>0
conjugate of z lies in II quadrant.