simplify / factor this for me please?

For some reason the answers in the book don't match up with the answer I'm getting... even though I know it's right.

Simplify this please.

3a^3(16-a^2)
--------------------------
12a^6(a^2-9a+20)

KarmaPoliceman2010-03-15T14:48:03Z

Favorite Answer

(a+4)/4a^3(a-5)

cajilus2017-01-17T09:19:11Z

a million. something to the 0 (^0) is = to a million. So no count form what's indoors the parenthesis the respond would be a million. 2. The GCF of 12X^4 and 6X^3 is complication-loose. all you're able to do is injury each and every ingredient down. x^4 has factors of x^4, x^2, and x^a million x^3 has factors of x^3 and x^a million comparable ingredient for the coefficients 12 has factors 12, 6, 4, 3, 2, a million 6 has factors 6, 3, 2, a million hence the respond is 6x^a million

Anonymous2010-03-15T14:51:28Z

a+4
----------
4a^3(a-5)

thats what I got, I think it's right ....

L. G2010-03-15T15:22:30Z

a^(4-a)*(4+a))
-------------------- =
4a^6(a-4)(a-5)

1
--------------------------
[4a^6(a-4)(a-5)][a^(a-4)(4+a)] =

1
---------------------
4a^(a-4)[(6a-30)+(4+a)] =


1
-------------------
4a^(a-4)(7a-26)