Algebra 1

$-3*(1-\sqrt5)/2$
3 inches long $(1+\sqrt5)/2$ $(1+\sqrt5)/2=3/x$ $6 = (1+\sqrt5)x$ $6/(1+\sqrt5) = (1+\sqrt5)x/(1+\sqrt5)$ $6/(1+\sqrt5) = x$ $6/(1+\sqrt5)$ $6/(1+\sqrt5) *(1-\sqrt5)/(1-\sqrt5))$ $6*(1-\sqrt5)/(1-\sqrt5+\sqrt5-5)$ $6*(1-\sqrt5)/-4$ $-3*(1-\sqrt5)/2$