Question 926703
{{{U^5-13U^3+36U=0}}}
{{{U(U^4-13U^2+36)=0}}}
{{{U(U^2-9)(U^2-4)=0}}}
{{{U(U-3)(U+3)(U-2)(U+2)=0}}}
Five solutions:
{{{U=0}}}
.
.
{{{U-3=0}}}
{{{U=3}}}
.
.
{{{U+3=0}}}
{{{U=-3}}}
.
.
{{{U-2=0}}}
{{{U=2}}}
.
.
{{{U+2=0}}}
{{{U=-2}}}