\(x^3 + 2x^2 - 15x\)
first we can factor out an x
\(x(x^2 + 2x - 15)\)
then we find a pair of numbers that multiply to -15 and add up to 2
this would be 5 and -3
because 5 times -3 = -15
and -3 + 5 = 2
we would then get
\(x(x-3)(x+5)\)
this would be you answer :)
