Find the remainder when f(x) is divided by (x-k)
F(x)=7x^4+12x^3+6x^2-5x+16 k=3

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 *_*