If $|z_1| =|z_2|$ and $\arg(z_1/z_2)=π $, then $z_1+z_2$ is
My attempt – We can represent $z_1$ and $z_2$ as two complex numbers at the same distances from origin in the Argand plane but I can't seem to represent the argument in the Argand plane. Can someone help me for this?