I need help with this problem

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

It says factor each expression 49x-28?

Solve for n? [tex]z = \frac{3}{4} mn[/tex]