I need help on this plz

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

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?