Question 108141
{{{4n^2 + 20n=0}}}
{{{n(4n+20)=0}}}
Two solutions
{{{highlight(n=0)}}}
{{{4n+20=0}}}
{{{4n=-20}}}
{{{highlight(n=-5)}}}
Check your answers. 
{{{4n^2 + 20n=0}}}
{{{4(0) + 20(0)=0}}}
{{{0=0}}}
True statement. Good answer.
{{{4n^2 + 20n=0}}}
{{{4(-5)^2 + 20(-5)=0}}}
{{{100-100=0}}}
{{{0=0}}}
True statement. Good answer.