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Posted by **Gilda** on Tuesday, October 4, 2011 at 5:48am.

Expand and Simplify 3(3x-y)^2

- Maths -
**Reiny**, Tuesday, October 4, 2011 at 8:17am3(3x-y)^2

= 3(3x-y)(3x-y)= 3(9x^2 - 3xy - 3xy + y^2)

= 27x^2 - 18xy + 3y^2

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