
Polynomial question
According to Edward T. Dowling within Schaum's Outline of Theory and problem of Mathematical methods for business and economics:
(3x^3  5x^2 y^2  2y^3)(7x4y) = 21x^2  12x^y  35x^3y^2 +20x^2y^3  14xy^3 + 8y^4
Can you clarify?
NOTE: Enclosing the above within is not readable through Latex.

Re: Polynomial question
Use the [TEX][ /TEX] tags, not the [tex][/MATH ] ones.
$\displaystyle (3x^3  5x^2 y^2  2y^3)(7x4y)$
$\displaystyle =7x(3x^3  5x^2 y^2  2y^3)4y(3x^3  5x^2 y^2  2y^3)$
$\displaystyle =7x(3x^3)+7x(5x^2y^2)+7x(2y^3)4y(3x^3)4y(5x^2y^2)4y(2y^3)$
$\displaystyle =21x^435x^3y^2...$
Finish and simplify and see what you get.