Question

Answer 1

a)\(A=-\dfrac{8}{5}x^4yz^3\)     hệ só : \(-\dfrac{8}{5}\)    biến \(x^4yz^3\)         baancj : 8

\(B=-3x^4yz^3\)          hệ sso : -3       biến :\(x^4yz^2\)           bậc : 7

Answer 2

b)\(A+B=-\dfrac{8}{5}x^4yz^3-3x^4yz^3=-\dfrac{28}{5}x^4yz^3x^4\)

\(A-B=-\dfrac{8}{5}x^4yz^3+3x^4yz^3=-\dfrac{23}{5}x^4yz^3=-\dfrac{23}{5}x^4yz^3x^4yz^3\)