Question

Find the conjugate of 5+-161.​

Answer 1

To find a complex conjugate, simply change the sign of the imaginary part (the part with the

i

). This means that it either goes from positive to negative or from negative to positive.

As a general rule, the complex conjugate of

a

+

b

i

is

a

−

b

i

.

Notice that the real part of a complex number comes first. Your number,

5

i

−

4

, can be rewritten as

−

4

+

5

i

.

Therefore, the complex conjugate of

−

4

+

5

i

is

−

4

−

5

i

.