Z1=(12-i) z2=(-1- i) z3(4+3i) z4(-3-2 I)

To prepare for university exams, it is important to have a good understanding of complex numbers and their properties. Let's analyze the given complex numbers:

z1 = 12 - i

Here, z1 is a complex number with a real part of 12 and an imaginary part of -1.

z2 = -1 - i

Similarly, z2 is a complex number with a real part of -1 and an imaginary part of -1.

z3 = 4 + 3i

In this case, z3 has a real part of 4 and an imaginary part of 3.

z4 = -3 - 2i

Lastly, z4 is a complex number with a real part of -3 and an imaginary part of -2.

Remember, complex numbers have both real and imaginary components. They can be represented in the form a + bi, where 'a' represents the real part and 'b' represents the imaginary part.