Find the difference vertically. −a^5 − (b^2 + a^2b^2) − (−a^5 − a^2b^2) the difference is

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

Find an equation of the line perpendicular to the graph of 28x-7y=9 that passes through the point at (4,1)

I’m stuck on this equation, anyone got the answer?