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Can I please have some help with matrices??? I don't understand a thing and I am...

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jessieh16 | Student, Grade 10 | Honors

Posted July 29, 2013 at 9:53 AM via web

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Can I please have some help with matrices???

I don't understand a thing and I am completely confused

Any help appreciated!

Jess

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steveschoen | College Teacher | (Level 3) Assistant Educator

Posted August 22, 2013 at 10:51 PM (Answer #2)

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Hi, jessiaeh16.  My name is Steve.  We will need to have more information for a more exact answer.  Some teachers can spend weeks on this topic alone.  In short, to add or subtract matrices, they have to be the same sizes.  If they aren't, you can't add/subtract them.  To multiply them, their sizes have to be "switched".  For instance, you can't multiply a 3 by 2 matrix with a 3 by 2 matrix.  But, you can multiply a 3 by 2 matrix with a 2 by 3 matrix.

Don't hesitate to post some more.  We are always willing to assist.

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