Multiply the polynomial (x-5)(x^2+4x-2)

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

What percent of the circle below is shaded?

Is it greater than or less than7*3_9*2