Is x=-3 a solution of the equation 2x+4=8+x? Show work
For pre algebra

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

Consider the function f(x)=-5x+3 what is f(-2)

How can you tell when x and y are not directly proportional?