Tree diagram to find the prime factors of 18

What is the missing constant term in the perfect square that starts with x^2 -20x

Which describes the difference between the graph of f(x)=x^2 and g(x)=-(x^2-2)

(c) the diagram shows the first three shapes of a matchsticks arrangement.first shape = 3second shape = 5third shape = 7given m represents the number of matchstick used to arrange the n'th shape.(i) write a formula to represent the relation between m and n. express m as the subjectof the formula.(ii) 19 matchsticks are used to make the p'th shape. find the value of p.