Question 650345

{{{ 20x^2+23x+6=0}}}...replace {{{23x}}} with {{{8x+15x}}}

{{{20x^2+8x+15x+6}}}....group {{{20x^2+15x}}} and {{{8x+6}}} together

{{{(20x^2+15x)+(8x+6)}}}....factor out {{{5x}}} from {{{20x^2+15x}}}, and {{{2}}} from {{{8x+6}}}

{{{5x(4x+3)+2(4x+3)}}}

{{{(4x+3)(5x+2)}}}