3*<51, 3<5,
99>*7, 9≥*, 9>7,
6*<8*, 6<8,
8*<9*, 8<9.
*5 и *4, <span>7* и *8 - не возможно</span>
18*х=90
Х=90:18
Х=5
Вот и все:)
(1+i)^4=(1+i)² *(1+i)²
(1+i)²=1+2i-1=2i
2i*2i=-4
(3+3i)^4 = 3^4 *(1+i)^4 =81*(-4)=-321
(20+4)•2=24•2=48
(13+17)•3=30•3=90
(50+1)•2=51•2=102
(18+12)•4=30•4=120
(200+3)•3=203•3=609
(48+52)•9=100•9=900