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√(5⁴/₉)·[√4-¹+(2⅘)-¹]=√(49/9)·[1/(√4)+(14/5)-¹]=7/3·[1/2+5/14]=7/3·[7/14+5/14]=
7/3·12/14=7/3·6/7=2/1=2
(√(7¹/₉)-√1,44·(1⅔)²=√(64/9)-1,2·(5/3)²=8/3-1,2·25/9=8/3-6/5·25/9=8/3-10/3=-²/₃
pierw z 7 1/9- pierw z 1,44 *(1 2/3)^2= pierw z 64/9 -1,2*25/9=8/3-12/10*25/9=8/3-300/90=8/3-10/3= -2/3