Final answer:
To multiply the polynomials (4m+n) and (m-2n), we use the distributive property and then combine like terms. The resulting polynomial is 4m^2-7mn-2n^2.
Step-by-step explanation:
To multiply the polynomials (4m+n) and (m-2n), we use the distributive property. We multiply each term in the first polynomial by each term in the second polynomial and then combine like terms.
So, multiplying (4m+n) by m, we get 4m^2+mn. Multiplying (4m+n) by -2n, we get -8mn-2n^2.
Finally, adding these results together, we have the polynomial 4m^2+mn-8mn-2n^2, which can be simplified to 4m^2-7mn-2n^2.
Learn more about Multiplying polynomials