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 :)

## Answer This Question

## Related Questions

- algebra - If the expression (x2+2x−1)8 is completely expanded, what is the...
- maths - If the expression (x^2+2x−1)^8 is completely expanded, what is the...
- math - Completely factor the expression 2a3 − 128. A. 2(a − 4)3 B. 2...
- math - Completely factor the expression 16t3 − 50t2 + 36t. A. 2t(8t −...
- math - Completely factor the expression 16t3 − 50t2 + 36t. A. 2t(8t −...
- Math - When you solve the system shown by the elimination method, which ...
- math - In the binomial series from (a+b)^5, the powers of a decrease by 1 each ...
- math - 1. What is the sum of 5/6 + 2/3? 2. Sue needs 2 1/3 cups of flour for a ...
- Math (Help Please) - 1. Which of the following shows how this expression can ...
- Algebra - I already posted this question,Steve answered it. I just wanted to ...

More Related Questions