The sum of 16 term of an ap is 504 why the sum of its 9 term is 126 find the sum of the 30 term, find the sum of the 20 term, find the sum of the 10 term

Ithink it’s b, hope this .

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 *_*