The number of states that entered the union in 1889

Need on this geometry question. explain how you did it.

In which form is the following function written? y = - 2(x – 3)(x + 5)

A3-dimensional figure has a square base and 4 lateral faces that meet at a point. explain the difference between the cross sections when a slice is made perpendicular to the base through the vertex, and when a slice is made perpendicular to the base and not through the vertex