Answer:
[tex]x^{3} -x^{2} -5x-3[/tex]
Step-by-step explanation:
you use distributive property for this, or you can do the box method
distributive:
[tex]x(x^{2} +2x+1)-3(x^{2} +2x+1)[/tex] (you multiply the second equation by x-3)
then distribute, or multiply everything
[tex]x^{3} +2x^{2} +x-3x^{2} -6x-3[/tex]
then collect like terms
[tex]x^{3} -x^{2} -5x-3[/tex]
