Jenny has 87 marbles and her brother has only 31. how many marbles should jenny give to her brother so that they have the same number of marbles? what would that number be?

Jenna should give her brother 28 so they both have 59 marbles

f(x) = x^3 -2x^2 -3x

x( x^2 -2x-3)

x( x^2 +x -3x -3)

x( x(x+1) -3(x+1))

x( x-3)( x+1)

so zeroes are 0, 3,-1

its (2) option