Now let’s be as general as possible by not identifying which base we are in. just call the base x.
consider the expression 1∙x³+2∙x²+7∙x+3∙1, or equivalently x³+2x²+7x+3.
a. what is the value of this expression if x=10?
b. what is the value of this expression if x=20?

The third and fourth box.

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 *_*