To find the product of a monomial and a trinomial, we need to multiply each term in the trinomial by the monomial and then add the resulting terms.
So, the product of the monomial x and the trinomial 2x² - 5x + 1 is:
x(2x² - 5x + 1) = 2x³ - 5x² + x
Therefore, the product of the monomial x and the trinomial 2x² - 5x + 1 is 2x³ - 5x² + x.