Respuesta :

Answer:

3x(x – 3)(x2 + 3x + 9)

Step-by-step explanation:

Because 3x4 – 81x=3x4-3x3

and the formula is

a3-b3=(a-b)(a2+ab+b2)

but since here it is 3x4 we put 3x before the formula.

Answer:

The answer is B: 3x(x – 3)(x2 + 3x + 9)

Step-by-step explanation:

You first do the x method.

Then find a&c

after find b

Hope this helps

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