Can someone please help me answer this math question? Please? I'll fan and give a medal!!
I'm working on polynomial division
Question -
21x^3 - 42x
-----------
7

Question

Can someone please help me answer this math question? Please? I'll fan and give a medal!! 
I'm working on polynomial division
 Question - 
21x^3 - 42x
-----------
               7

abbycross167 · Answer

@Photon336  could you help me please? I don't know what to do with the ^3

photon336 · Answer

HiNT: On the top you can factor out a 7x

abbycross167 · Answer

what do you mean? like subtract 7x from 42x?

abbycross167 · Answer

oh but what about the 21^3 and 42?

photon336 · Answer

$$\frac{ 21x(x^{2}-2) }{ 7} =  3x(x^{2}-2) $$

abbycross167 · Answer

oh ok then what should I do?

photon336 · Answer

hmm that's all you can do for this problem

abbycross167 · Answer

I'm sorry but I'm a little confused... could you explain the steps? I went through the steps we did but I think some of them were deleted

photon336 · Answer

so for the top we need to factor, this means taking out a  number that is in every term. 

so we can factor out a 21 

21(x^{3}-2)

photon336 · Answer

because  21 goes into itself once and 41 twice.

photon336 · Answer

so if you were to multiply  21 by the terms in the (  ) you would get what you had before 21x^3 -42x

abbycross167 · Answer

oh ok

abbycross167 · Answer

so divide 21 by 21 and 42?

abbycross167 · Answer

@Photon336  ?

photon336 · Answer

|dw:1460678564275:dw|