2 Write a two-step equation that has a solution of 20

The function ƒ is defined by ƒ(x) = (x + 3)(x + 1). the graph of ƒ in the xy-plane is a parabola. which interval contains the x-coordinate of the vertex of the graph of ƒ?

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

Write an equation of the line that passes through 9,2 and is parallel to the line y=5/3x+9