Question

Answer 1

a: \(A=\dfrac{-1}{3}\cdot x^3y\cdot5x^2y^3z^3=-\dfrac{5}{3}x^5y^4z^3\)

\(B=-2xy^2z\cdot9x^4y^2z^2=-18x^5y^4z^3\)

b: \(A+B=-\dfrac{59}{3}x^5y^4z^3\)

Answer 2

Bài 2:a.
A=\(_{-\dfrac{5}{3}x^5y^4z^3}\)
B=\(-6x^5y^4z^3\)
b.\(A+B=-\dfrac{23}{3}x^5y^4z^3\)

Answer 3

a)\(A=-\dfrac{5}{3}y^4x^5z^3\)

\(B=-18y^4x^5z^3\)

b)\(A+B=-\dfrac{59}{3}y^4x^5z^3\)