Answer:
[tex](5x^{4} + 9x^{3} + 6x^{2} + 1x)[/tex]
Step-by-step explanation:
[tex](5x^{3} + 9x^{2} + 6x + 1) * x[/tex]
Multiplying the term by x, adds 1 to the power.
EG
[tex]5x^{3} * x = 5x^{3+1} = 5x^{4}[/tex]
Therefore
[tex](5x^{3} + 9x^{2} + 6x + 1) * =\\(5x^{4} + 9x^{3} + 6x^{2} + 1x)[/tex]
