Question 112928
let x="width of border"


if the photo is 14 by 20, then the mat will be (14+2x) by (20+2x)
___ an x width border on both ends of length and width


so the area is (14+2x)(20+2x), which equals 352


280+68x+4x^2=352 ___ x^2+17x-18=0 ___ (x+18)(x-1)=0