Write (5y) exponent 2 without exponents

Find and simplify an expression for the area of five rows of x squares with side lengths of x centimeters.

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

Ineed i been stuck on this question since yesterday