Answer
1.4 feet
Work Step by Step
$8*12=96$
$96/2 = 48$
$(8-2x)(12-2x)=48$
$96-16x-24x+4x^2=48$
$4x^2-40x+96=48$
$4(x^2-10x+24=12)$
$x^2-10x+24=12$
$x^2-10x+12 = 0$
$x=(-b±\sqrt {b^2-4ac})/2a$
$x=(-(-10)±\sqrt {(-10)^2-4*1*12)}/2*1$
$x=(10±\sqrt {100-48})/2$
$x=(10±\sqrt {52})/2$
$x=(10±7.21)/2$
$x=(10+7.21)/2$
$x=17.21/2$
$x=8.605$ (this is bigger than the frame, so this answer won't work)
$x=(10-7.21)/2$
$x=2.79/2$
$x=1.395$
