Posted by **Francine Patton** on Tuesday, May 22, 2007 at 10:04am.

What is the value of expression 2x squared + 3xy-4y squared when x=2 and y=-4?

I will be happy to critique your work on this. Substitute the numbers in, and add.

- Math Algebra -
**Hipolito**, Sunday, April 14, 2013 at 6:38pm
2x^2+3xy-4y^2=

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