What two numbers multiply to give you -210 but add to give you -23

The answer is 15 and 8 because they equals 23 and when you multiply them it equals 210

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 *_*