X1 = 1/2^1 + 2^1 = 1/2 + 2 = 2,5
x2 = 1/2^2 + 2^2 = 1/4 + 4 = 4,25
x3 = 1/2^3 + 2^3 = 1/8 + 8 = 8,125
x4 = 1/2^4 + 2^4 = 1/16 + 16 = 16,0625
x5 = 1/2^5 + 2^5 = 1/32 + 32 = 32,03125
(3х^2+у)(2у-5х^2)=6х^2у-15х^4+2у^2-5х^2у=х^2у-15х^4+2у^2
(7х-1)(х^2-4х+2)=7х^3-28х^2+14х-х^2+4х-2=7х^3-27х^2+18х-2
См фото
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