How do you factor 4x^2 - 40x + 9

In which direction does the left side of the graph of this function point? a(x) = 3x - x2 + 4x - 2

The students in a class were asked how many siblings they have. the data obtained is represented in the dot plot. the number of students who have no siblings is . the number of students who have three or more siblings is .

Use the squared identities to simplify sin^2x cos^2x