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AB=(√2+√18,√3+√243)
długość wektora |AB|=√(x^2+y^2)
|AB|=√((√2+√18)^2+(√3+√243)^2)
(√2+√18)^2=2+2√(2*18)+18= 2+2*6+18=32
(√3+√243)^2)=3+2√(3*243)+243= 3+2√729+243= 3+2*27+243=300 |AB|=√(32+300)=√332=18,2209