The coefficient of the product of (-5xy2) and (-4x2y) is

. The exponent of x in the product is

, and the exponent of y is

The coefficient is the number, therefore - 5 and - 4,

The exponent of the first x is 1 and the second x is 2, if the 2 is meant as an exponent. The first exponent of y is 1 and 5e second y is 2