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| Question 375956:  Expand
   I was able to expand to:
 
   I multiplied the coefficients through and got:
 
   Is this the complete expansion?
 Thanks for your time!
 Found 2 solutions by  Alan3354, jim_thompson5910:
 Answer by Alan3354(69443)
      (Show Source): Answer by jim_thompson5910(35256)
      (Show Source): 
You can put this solution on YOUR website! 
 
  Start with the given expression 
 To expand this, we're going to use binomial expansion. So let's look at Pascal's triangle:
 1
 1   1
 1   2   1
 1   3   3   1
 1   4   6   4   1
 1   5   10   10   5   1
 1   6   15   20   15   6   1
 
 
 
 Looking at the row that starts with 1,6, etc, we can see that this row has the numbers:
 
 1, 6, 15, 20, 15, 6, and 1
 
 These numbers will be the coefficients of our expansion. So to expand
  , simply follow this procedure: Write the first coefficient. Multiply that coefficient with the first binomial term
  and then the second binomial term  . Repeat this until all of the coefficients have been written. 
 Once that has been done, add up the terms like this:
 
 
 
  Notice how the coefficients are in front of each term. 
 
 
 However, we're not done yet.
 
 
 
  Looking at the first term  , raise  to the 6th power and raise  to the 0th power. 
 
  Looking at the  second term  raise  to the 5th power and raise  to the 1st power. 
 Continue this until you reach the final term.
 
 
 Notice how the exponents of
  are stepping down and the exponents of  are stepping up. 
 
 So the fully expanded expression should now look like this:
 
 
 
   
 
 
  Distribute the exponents 
 
 
  Multiply 
 
 
  Multiply the terms with their coefficients 
 
 So
  expands and simplifies to  . 
 
 In other words,
   
 
 If you need more help, email me at jim_thompson5910@hotmail.com
 
 Also, feel free to check out my tutoring website
 
 Jim
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