Question

разложите на множители x(в 3 степени)-7x-6

Answer 1

х³-7х-6=х³-6х-х-6=(х³-х)-(6х+6)=х(х²-1)-6(х+1)=х(х-1)(х+1)-6(х+1)=
=(х+1)(х(х-1)-6)=(х+1)(х²-х-6)=(х+1)(х+2)(х-3)