Supposw that four times of a number equals 20 times that number. What is the number?

The number is 5.
You can divide 20 by 4 and you will get 5.

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 *_*