(geometry) i would appreciate help please

Which is the completely factored from of xy^3-x^3y

In the sixth grade 13 out of 20 students have a dog if there are 152 sixth grade students how many of them have a dog

Is there a direction u in which the rate of change of f(x,y)equals=x squared minus 3 xy plus 4 y squaredx2−3xy+4y2 at p(1,2) equals 14? give reasons for your answer. choose the correct answer below. a. no. the given rate of change is smaller than the minimum rate of change. b. no. the given rate of change is larger than the maximum rate of change. c. yes. the given rate of change is larger than the minimum rate of change and smaller than the maximum rate of change.