Pls help i keep getting it wrong.

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

Define multiplicative inverse. give an example of a number and its multiplicative inverse.

Which is f(5) for the function –2x2 + 2x - 3?