Question 1171031


{{{(2x+1)^2=5x}}}

{{{(2x)^2+2*2x*1+1^2=5x}}}

{{{4x^2+4x+1=5x}}}

{{{4x^2+4x-5x+1=0}}}

{{{4x^2-x+1=0}}} -> compare to {{{ax^2+bx+c=0}}} and you see that

{{{a=4}}}
{{{b=-1}}}
{{{c=1}}}