Posted by hmmm on Monday, April 29, 2013 at 11:28am.
If the expression (x^2+2x−1)^8 is completely expanded, what is the sum of the coefficients of the terms with even powers of x?

Math!!! can't solve this...  Steve, Monday, April 29, 2013 at 11:52am
256
Not sure what's the point of using such a high power. Tedious, but doesn't provide any real insight.

Math!!! can't solve this...  boy, Monday, April 29, 2013 at 11:56am
@Steve r u sure of ur answer?

Math!!! can't solve this...  Reiny, Monday, April 29, 2013 at 1:04pm
Steve is correct, the sum is 256
I let Wolfram do all the drudgery
http://www.wolframalpha.com/input/?i=expand+%28x%5E2%2B2x−1%29%5E8
Agree with Steve, this question is simply a test of patience.

Math!!! can't solve this...  Steve, Monday, April 29, 2013 at 1:55pm
Thanks, Reiny. I used wolfram also :)
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