How do i find the all the zeros of the equation -3x^4+27x^2+1200=0?

What is the percent of increase for a population that changed from 438,000 to 561,000

(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.

What is fraction that is equivalent to 3/8