Question 201300
Solve by factoring:
{{{a^2-3a-18 = 0}}} Factor the trinomial.
{{{(a-6)(a+3) = 0}}} Apply the zero product rule.
{{{a-6 = 0}}} or {{{a+3 = 0}}} so...
{{{highlight(a = 6)}}} or {{{highlight(a = -3)}}}