Write the expression 18 - 27-9 in the form of a +bi. which number in the form of \(a+biv) is equivalent to \(18-2\sqrt{-9}\)? o o o o (18+6i\) \(18-611) (18-311) v(18-1811)

(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.