Question 299944
{{[A=80}}}
{{{W=(3+(1/2)L)}}}
{{{A=LW}}}
{{{80=L(3+(1/2)L)}}}
{{{80=(3L+(1/2)L^2)}}}
{{{160=6L+L^2}}}
{{{0=L^2+6L-160}}} 2 numbers multiply to get -160 add to get +6: -10 and 16
{{{0=(L-10)(L+16)}}}
{{{L=10}}},{{{-16}}} cant be negative
{{{W=(3+(1/2)L)}}}
{{{W=(3+(1/2)(10))}}}
{{{W=(3+5)}}}
{{{highlight(W=8)}}}