Find the multiplicity of
2x^3+x^2-x

Mulitpilicty is how many times a root repeats

factor
factor x first

x(2x^2+x-1)
using math
(x)(x+1)(2x-1)
no roots repeat

if it is equal to 0 then the roots are
0 multiplicty 1
-1 multiplicty 1
1/2 multiplicty 1

50 % is the answer !

I'm not sure exactly but my best guess would be 1/4