Which identity could be used to rewrite the expression x^9-8

Which graph represents an even function?

Marquise has 200 meters of fencing to build a rectangular garden. the garden's area (in square meters) as a function of the garden's width w w (in meters) is modeled by: a ( w ) = − w 2 + 1 0 0 w a(w)=−w 2 +100w what side width will produce the maximum garden area? meters

State how many imaginary and real zeros the function has. f(x) = x3 - 20x2 + 123x - 216