Posted by **Anonymous** on Tuesday, January 11, 2011 at 10:12pm.

Can you check my answer and the work? Thank youu~~

(2x-y)7

128x7 -448x6y -672x5y2 -560x4y3 -280x3y4 -84x2y5 -14xy6 -y7

orr

128x7 -448x6y +672x5y2 - 560x4y3 +280x3y4 -84x2y5 +14xy6 -y7

Ps: the 7 in the equation is the exponent and the numbers after the variable are also the exponent

- Algebra 2 -
**helper**, Tuesday, January 11, 2011 at 10:25pm
+ 672x^5y^2 - 280x^3y^4 + 14xy^6

only the signs were wrong for the above

corrections

I used an online calculator to expand so I know it's right

- Algebra 2 -
**Anonymous**, Tuesday, January 11, 2011 at 10:29pm
so is it this?

128x7 -448x6y +672x5y2 - 560x4y3 +280x3y4 -84x2y5 +14xy6 -y7

or

128x7 -448x6y +672x5y2 -280x3y4 +14xy6

?

- Algebra 2 -
**helper**, Tuesday, January 11, 2011 at 10:32pm
sorry, I didn't see your 2nd line after

"or", so the correction applies to your first line/answer

- Algebra 2 -
**Anonymous**, Tuesday, January 11, 2011 at 10:34pm
k thank youuu~~~ =)

- Algebra 2 -
**helper**, Tuesday, January 11, 2011 at 10:40pm
you're welcome

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