1) i43 2) (6+2i)+(5+3i) 3) (6+4i)*(5+2i) 4) 3-i/5-3i 5)x2+3x+4=0

Question

1) i43 2) (6+2i)+(5+3i) 3) (6+4i)*(5+2i) 4) 3-i/5-3i 5)x2+3x+4=0

Answer 1

Ответ:

11+5і

30+12і+20і+8і2=30+32і+8і2

5х+4=0

з=4/5(0.8)