Question 210236
{{{2a(x+3)-3a(x-3)}}} Start with the given expression.



{{{2ax+6a-3ax+9a}}} Distribute



{{{(2ax-3ax)+(6a+9a)}}} Group like terms.



{{{-ax+15a}}} Combine like terms.



{{{-a(x-15)}}} Factor out the {{{-a}}}



So {{{2a(x+3)-3a(x-3)=-a(x-15)}}}