Q. Use the Fundamental Theorem of Algebra to find the number of complex roots of the polynomial, including any repeated roots. x6+x5+3x2−x+15____
Degree of the Polynomial: The degree of the polynomial x6+x5+3x2−x+15 is 6, because the highest power of x is 6.
Fundamental Theorem of Algebra: According to the Fundamental Theorem of Algebra, a polynomial of degree n has exactly n complex roots, counting multiplicity.
Complex Roots: Therefore, the polynomial x6+x5+3x2−x+15 has 6 complex roots.