Question 143843
let x="length of a side" __ (.5)x^2+(1)4x=120


subtracting 120 and multiplying by 2 __ x^2+8x-240=0


factoring __ (x+20)(x-12)=0


x+20=0 __ x=-20 __ negative value not realistic


x-12=0 __ x=12