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July 4, 2015

Homework Help: Algebra

Posted by Rachelle on Wednesday, November 12, 2008 at 5:30pm.

I used an online math site, to explain quadratic equations. But the thing is, they said that (-4)^2 is 16, but my calculator said -16. Why is that? And also, how does the square root of 40 break down into the square root of 4 and the square root of ten? Does this have to do with GCF's?

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