How do I solve this problem?

Y=(x+3)(x-4)(x+1)^2 sulutions? multiplicity?

What sums are equal to 6/12? choose all answers that are correct a.6/12+6/12+6/12+6/12+6/12+6/12 b.2/12+1/12+1/12+2/12 c.5/12+1/12 d.1/12+1/12+1/12+3/12 plz : )

Ijust need these 2 questions answered (the second pic is just confirmation i'm not confident in that answer)