Question 646139

{{{5x^2-8x-4}}}....replace {{{-8x}}} with {{{2x-10x}}}

{{{5x^2+2x-10x-4}}}...rearrange the terms

{{{5x^2-10x+2x-4}}}...group

{{{(5x^2-10x)+(2x-4)}}}...factor out

{{{5x(x-2)+2(x-2)}}}

{{{(x-2)(5x+2)}}}