Question

Giải dùm mình cảm ơn mn

Answer 1

Answer 2

a, \(4x^3-5x^2y-xy=x\left(4x^2-5xy-y\right)\)

b, \(x^3y^4\left(x^2-y^3\right)-x^3y^3\left(x^4-y^4\right)\)

\(=x^3y^3\left[y\left(x^2-y^3\right)-x^4+y^4\right]\)

\(=x^3y^3\left(x^2y-x^4\right)=x^5y^3\left(y-x^2\right)\)

Answer 3

\(=x^5y^4-x^3y^7-x^7y^3+x^3y^7^{ }\)
=x⁵y⁴-x⁷y³

Answer 4

\(x^3y^4\left(x^2-y^3\right)-x^3y^3\left(x^4-y^4\right)\)

\(=x^5y^4-x^3y^7-x^7y^3+x^3y^7\)

\(=x^5y^4-x^7y^3\)