Answer:
Step-by-step explanation:
i dont know man sorry
u + v
=2-i + -4+ 5i
=2-4+5i-1i
= -2+4i
u- v
=2- 1i - -4 + 5i
=2+4 +5i-1i
=6+4i
u × v
=2- 1i × -4 + 5i
= -8 +4i +10i -5i
= -8 + 14i - 5i
= -8 + 9i
u ÷ v
= 2- 1i ÷ -4 +5i
= -2+2.5i - 4i - 5
= -2-5 + 2.5i - 4i
