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February 1, 2015

Posted by **Robin** on Tuesday, July 6, 2010 at 5:32pm.

- algebra -
**Damon**, Tuesday, July 6, 2010 at 7:29pmxy * wz = (10x + y)(10w+z)

=100xw+10xz+10yw+yz

yx * zw = (10y+x)(10z+w)

=100yz+10yw+10xz+xw

These can be the same but not usually

eg

12*21

- algebra -
**Jaz**, Wednesday, July 7, 2010 at 1:51amThank-you Damon

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