równanie wielomianowe
: 4 sty 2012, o 19:30
\(\displaystyle{ x ^{3} -2x ^{2} -9x+18=0}\)
\(\displaystyle{ x ^{2}(x-2)-9(x-2)>0}\)
\(\displaystyle{ (x-2)(x+3)(x-3)>0}\)
\(\displaystyle{ x=2 \vee x=-3 \vee x=3}\)
\(\displaystyle{ x ^{2}(x-2)-9(x-2)>0}\)
\(\displaystyle{ (x-2)(x+3)(x-3)>0}\)
\(\displaystyle{ x=2 \vee x=-3 \vee x=3}\)