How do you solve a quadratic equation by factoring

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

(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.

Parallelogram efgh is a rectangle. he = 6, and fe = 8. find ge: and find fj: