Date: Jun 16, 2010 3:15 PM
Author: Jonathan Halabi
Subject: Re: #32
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

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