Question 910141

{{{x^2+13x+36}}}........write {{{13x}}} as {{{4x+9x}}}


{{{x^2+4x+9x+36}}} ........group


{{{(x^2+4x)+(9x+36)}}}


{{{x(x+4)+9(x+4)}}}


{{{(x+9)(x+4)}}}