Respuesta :

The first choice is the answer
MarkV
Hi there! The first answer is correct.

[tex](4 x^{3} y^{4} z^{8} )(3 x^{7} y^{5} z^{4} ) = 12x^{3+7} y^{4+5} z^{8+4} =12 x^{10} y^{9} z^{12}[/tex]
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