Question

please answer this question​

Answer 1

Answer:

$\frac{ - 3 + i}{5}$

Step-by-step explanation:

(1-2i)²

using the formula for (a-b)²

= 1 -4i -4

= -3 - 4i

$\frac{(1 + 3i)(3 - 4i)}{ - (3 + 4i)(3 - 4i)}$

Now ,. factorising. the denominator

- (3+4i) (3 -4i)

=-(9 + 16) = -25

multiplying numerator

3 + 9i -4i +12

= 15-5i

so the answer is

$\frac{ - 3 + i}{5}$