Respuesta :

Answer:

[tex]f(x)=-63xy^8[/tex]

Step-by-step explanation:

[tex]f(x)=(-9x^4y^6)(7x^{-3}y^2)[/tex]

[tex]f(x)=(-63x^{4-3}y^{6+2})[/tex]

[tex]f(x)=-63xy^8[/tex]

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