Question 953266
{{{x^5 + 7x^4=18x^3}}}

{{{x^5 + 7x^4-18x^3=0}}}

{{{(x^2 + 7x-18)x^3=0}}}

{{{(x^2 -2x+ 9x-18)x^3=0}}}

{{{((x^2 -2x)+ (9x-18))x^3=0}}}

{{{(x(x -2)+9 (x-2))x^3=0}}}

{{{((x+9)(x-2))x^3=0}}}

solutions:

if {{{(x+9) =0}}}=>{{{x=-9}}}
if{{{ (x-2)=0}}}=>{{{x=2}}}
if {{{x^3=0}}}=>{{{x=0}}} (triple solution)

a list of all the roots:{{{x=0}}},{{{x=2}}},{{{x=-9}}}