how to Simplify 5x3 – 2x2 + x + 4x3
\(5x^3 - 2x^2 + x + 4x^3\\\\=5x^3 + 4x^2 -2x^2 + x\\\\=\boxed{\bf{9x^3 +4x^2 + x}}\\\\=\boxed{\bf{x(9x^2 + 4x + 1)}}\)