Posted by JoyceLynn on Saturday, April 9, 2011 at 12:06pm.
you can't solve anything without an equals sign.
Here, I think you are supposed to be expanding it knowing the binomial expansion. Memorize it.
Working thru your whole worksheet will give you ample practice to do each term (each k term). It becomes as easy as eating pie.
http://hyperphysics.phy-astr.gsu.edu/hbase/alg3.html#bt
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