glittergurl0101 glittergurl0101 02-04-2015 Mathematics Answered Determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 25x + 25 is not a difference of squares is a difference of squares: (y – 5)2 is a difference of squares: (y – 5)(y + 5) is a difference of squares: (y + 5)2