Respuesta :

Answer::

[tex]5a^2-2a^3+7a[/tex]

Explanation:

Given the expression:

[tex]5a^2^{}+3a-2a^3+4a[/tex]

First, we arrange:

[tex]=-2a^3+5a^2+3a+4a[/tex]

We then combine to obtain:

[tex]=5a^2-2a^3+7a[/tex]

The correct choice is B.

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