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=(\/2 x)^2 -2*\/2 x*2\/2 +(2\/2)^2 -2x^2+8x= 2x^2 - 8x +8 -2x^2+8x=8
a wiec wartosc wyrazenia 8 niezalenie od x.
2.
pierwiastki tego wielomianu : 0, 1 , 9/16
0+1+ 9/16= 1 9/16= 25/16
p= 25/16
\/p= \/(25/16)= 5/4