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Mathematics 7 Online
OpenStudy (pixiedust1):

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OpenStudy (e.mccormick):

You use matrix determinant? Yah. I got 2 also.

OpenStudy (e.mccormick):

Hehe. Well, there are usually several ways to do things in math. If you use one to do it and one to check it you can usually find and correct mistakes.

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