Math!!! can't solve this...

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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... -

    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... -

    @Steve r u sure of ur answer?

  • Math!!! can't solve this... -

    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... -

    Thanks, Reiny. I used wolfram also :)

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