Which of the following is the solution set of 18 - 3n + 2 = n + 20 - 4n? ø {0} all reals

18-3n+2=n+20-4n  combine like terms on each side

20-3n=20-3n

So the above is true for all real values of n.  n=(-oo, +oo)  (all real values)

Answer to your question: a. the fundamental theorem of algebra tells you that the equation will have two complex roots since the degree of the polynomial is 2. the roots are ​ x=1±i7√2 .number of roots=degree of polynomialhere, degree of polynomial is 2 so number of roots will be 2.hope it *_*