решение:
(5х-4)³+5х-4=0
125х³-300х²+240х-64+5х-4=0
125х³-100х²-200х²+245х-68=0
125х³-100х²-200х²+160х+85х-68=0
25х²×(5х-4)-40х×(5х-4)+17(5х-4)=0
(5х-4)×(25х²-40х+17)=0
5х-4=0
25х²-40х+17=0
х=
[tex] \frac{4}{5} [/tex]
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решение:
(5х-4)³+5х-4=0
125х³-300х²+240х-64+5х-4=0
125х³-100х²-200х²+245х-68=0
125х³-100х²-200х²+160х+85х-68=0
25х²×(5х-4)-40х×(5х-4)+17(5х-4)=0
(5х-4)×(25х²-40х+17)=0
5х-4=0
25х²-40х+17=0
х=
[tex] \frac{4}{5} [/tex]