Question 459463

1.

{{{x^2+6x-27}}}.........replace {{{6x}}} with {{{-3x+9x}}}

{{{x^2-3x+9x-27}}}...group

{{{(x^2-3x)+(9x-27)}}}

{{{x(x-3)+9(x-3)}}}


{{{(x+9)(x-3)}}}

2.

{{{4c^2+9c-28}}}.........replace {{{9c}}} with {{{-7c+16c}}}

{{{4c^2-7c+16c-28}}}

{{{4c^2+16c-7c-28}}}.....group

{{{(4c^2+16c)-(7c+28)}}}

{{{4c(c+4)-7(c+4)}}}

{{{(4c-7)(c+4)}}}