câu 1
\(-\frac{2}{3}xy^2z.\left(-3x^2\right)\)
\(=\left[\left(-\frac{2}{3}\right).\left(-3\right)\right].\left(x.x^2\right).y^2.z\)
\(=2x^3y^2z\)
Bâc là 6
Bài 2
\(5xy^2+\frac{1}{4}xy^2+\frac{-1}{2}xy^2\)
\(=xy^2\left(5+\frac{1}{4}+\frac{-1}{2}\right)\)
\(=\frac{19}{4}xy^2\)
CÂU 1:
A) \(\frac{-2}{3}xy^2z.\left(-3x^2\right)=\left(\frac{-2}{3}.\left(-3\right)\right).\left(xx^2\right).y^2z=2x^3y^2z\)
+) BẬC CỦA ĐƠN THỨC : 6
CÂU 2:
\(5xy^2+\frac{1}{4}xy^2+\left(\frac{-1}{2}xy^2\right)=\left(5+\frac{1}{4}+\frac{-1}{2}\right)xy^2\)
\(=\frac{19}{4}xy^2\)
CHÚC BN HỌC TỐT!!!!
1)
\(\frac{-2}{3}xy^2z.\left(-3x^2\right)=2x^3y^2z\)
đa thức bậc 3
2)
\(5xy^2+\frac{1}{4}xy^2+\left(-\frac{1}{2}xy^2\right)=\frac{100xy}{20}^2+\frac{5xy^2}{20}-\frac{10xy^2}{20}=100xy^2+5xy^2-10xy^2=95xy^2\)