Question

Find the solutions to this equation algebraically using the Fundamental Theorem of Algebra, the Rational Root Theorem, Descartes' Rule of Signs, and the Factor Theorem:
V = x^3 - x^2 - 20x

Answer 1

Factor Theorem
\[V = x^3 - x^2 - 20x=x(x^2-x-20)=x(x^2-5x+4x-20)\\=x(x(x-5)+4(x-5))=x(x-5)(x+4)\]

Answer 2

thx

Answer 3

welcome