How do i factor this trinomial? 4c^2-12c+9

A. what does the point (4, 122) represent? b. what is the unit rate? c. what is the cost of buying 10 tickets?

Two numbers have a sum of -19. one number is x. what expression represents the other number?

Whats are the trickiest steps to do when adding or subtracting rational expressions? how does knowledge of rational numbers u in adding and subtracting rational expressions?