1). 3ab*2a^2b=6a^3b^2; 2). (-4x^2y)*(-7xy^2)=28x^3y^3; 3). (8ab^2)*(1/4ac^2)=2a^2b^2c^2; 4). (6a^2b)*(1/3bc^2)=2a^2b^2c^2.
1). 3ab*2a^2b=6a^3b^2; 2). (-4x^2y)*(-7xy^2)=28x^3y^3; 3). (8ab^2)*(1/4ac^2)=2a^2b^2c^2; 4). (6a^2b)*(1/3bc^2)=2a^2b^2c^2.