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Re: #32
Posted:
Jun 16, 2010 3:15 PM



I belive you are correct. The square root of x squared is the absolute value of x.
for example, the square root of (3) squared is 3, not 3.
We noticed this as we were keying the exam.
Jonathan Halabi HS of American Studies the Bronx
On Wed, Jun 16, 2010 at 2:48 PM, <TKENYON@crcs.wnyric.org> wrote:
> I didn't teach the course this year, and most of the students had the same > answer as was on the answer key, but unless it's declared "x>=0", isn't the > square root of x² = absolute value of x, not just a plain x? i.e. the > best answer for 32 would be x sqrt(3x) > Am I missing something? > > Tom Kenyon > CRCS Mathematics/Physics > tkenyon@crcs.wnyric.org > ******************************************************************* * To > unsubscribe from this mailing list, email the message * "unsubscribe > nyshsmath" to majordomo@mathforum.org * * Read prior posts and download > attachments from the web archives at * > http://mathforum.org/kb/forum.jspa?forumIDg1*******************************************************************



