# maths

posted by
**ianian**
.

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?

Details and assumptions

0 is an even number.

posted by
**ianian**
.

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?

Details and assumptions

0 is an even number.