Question

Answer 1

a: A*B=-6x^3y^3

b: A*B*C=-6x^3y^3*1/10x^3y^4=-3/5x^6y^7

Answer 2

\(a,A.B=\left(3x^2y\right).\left(-2xy^2\right)=-6x^3y^3\)

\(b,A.B.C=\left(3x^2y\right).\left(-2xy^2\right).\left(\dfrac{1}{10}x^3y^4\right)\)

\(=\left(-6x^3y^3\right).\left(\dfrac{1}{10}x^3y^4\right)\)

\(=-\dfrac{3}{5}x^6y^7\)