What is this called? I’m trying to look up a video on how to do these.
y = - 7/2x -4

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 are the solutions of the system? solve by graphing. y = x^2 + 3x + 2 y = 2x + 2

If the value of cos330°is√3/2 then find cos 165°.