wiedząc że x+1/x = 3 oblicz xkwadrat + 1/x kwadrat
x+1/x=3
x²+(1/x)²+2·x·1/x=9
x²+(1/x)²+2=9
x²+(1/x)²=7
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x+1/x=3
x²+(1/x)²+2·x·1/x=9
x²+(1/x)²+2=9
x²+(1/x)²=7