Question

. Find the product
3 − i 4
−4 3 + i
! 2 5 − 2i
−5 − 2i 2
!
.

Answer 1

1) $(3-4i)\times (-43+i)$

$= 3\times-43+3i-4i\times-43-4i^{2}= -125+175i$

Answer : $25(-5+7i)$

2) $(25-2i)\times(-5-22i)$

$= 25 \times -5 + 25 \times -22i - 2i \times -5 + 44i^{2} = -169 -540 i$

Answer :  -169 -540 i