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Topic: re: #32
Replies: 23   Last Post: Jun 18, 2010 5:18 AM

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Sharon

Posts: 410
From: NYC
Registered: 6/26/05
Re: #32
Posted: Jun 16, 2010 6:11 PM
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And here is my question to you all: If we are so confused, how are we supposed to expect that our students would have known this??

Sharon










-----Original Message-----
From: Linda Restive <precopio@nycap.rr.com>
To: nyshsmath@mathforum.org
Sent: Wed, Jun 16, 2010 4:48 pm
Subject: Re: #32


but x is a variable so it could be anything, why assume x^3 is positive? Are you saying that if it were negative it would read -x^3? This is hard to do in email!
----- Original Message ----- From: "Mary Zanetti" <zanegray49@hvc.rr.com>
To: <nyshsmath@mathforum.org>
Sent: Wednesday, June 16, 2010 4:27 PM
Subject: Re: #32

> Since they are asking yofind the square root of x^3, x must be positive > for x^3 to be positive...
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