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Posted by **lilian** on Tuesday, May 10, 2011 at 10:36pm.

answer:would it be 9D^2(2+5D^4)?

- math10 -
**Reiny**, Tuesday, May 10, 2011 at 10:42pmno, try expanding your answer, you will not get the original.

should be

9D^3(2 + 5D^3)

- math10 -
**lilian**, Tuesday, May 10, 2011 at 10:48pmwell it says:

A 9D(2D+5D^5)

B 6D^2(3+9D^4)

C 3D^2(6+15D^4)

D 9D^2(2+5D^4)

- math10 -
**Reiny**, Tuesday, May 10, 2011 at 10:51pmAnd none of those answers , when expanded , will give you the original question the way you typed it.

So what do you think????

- math10 -
**lilian**, Tuesday, May 10, 2011 at 10:54pmi thought the answer was D

- math10 -
**Reiny**, Tuesday, May 10, 2011 at 11:01pm1. Did you expand D ?

2. Did you check the typing of your original question?

- math10 -
**lilian**, Tuesday, May 10, 2011 at 11:05pmoh sorry it is 18D^2+45D^6 not 18D^3

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