Z1=(8-7i) z2=(-4+7i)

To perform operations with complex numbers, we can add and subtract the real and imaginary parts separately.

To add z1 and z2, we add their real parts and imaginary parts separately: z1 + z2 = (8 - 7i) + (-4 + 7i) = (8 - 4) + (-7i + 7i) = 4 + 0i = 4

To subtract z2 from z1, we subtract their real parts and imaginary parts separately: z1 - z2 = (8 - 7i) - (-4 + 7i) = (8 + 4) + (-7i - 7i) = 12 - 14i

Therefore, z1 + z2 = 4 and z1 - z2 = 12 - 14i.