There are 20 at lunch . one -fifth of the students are in the hall . how many students are in the hall ?

There are 4 students in the hall the work is pretty esay

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 *_*