Ответ:
4
=(108-98)(108+98)=2060
=(40+2)(40-2)=1600-4=1596
=(60-1)^2=3600-120+1=3481
5
=х(х+2)=0,х1=0,х2=-2
=х^2=9,х1=3,х2=-3
=х(-7х+2)=0,х1=0,х2=2/7
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Ответ:
4
=(108-98)(108+98)=2060
=(40+2)(40-2)=1600-4=1596
=(60-1)^2=3600-120+1=3481
5
=х(х+2)=0,х1=0,х2=-2
=х^2=9,х1=3,х2=-3
=х(-7х+2)=0,х1=0,х2=2/7