Help

At the newest animated movie, for every 9 children, there are 4 adults. there are a total of 39 children and adults at the movie.

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

Which expression is not a polynomial?