My Math Forum Exponent Question

 Algebra Pre-Algebra and Basic Algebra Math Forum

 March 12th, 2011, 01:45 PM #1 Newbie   Joined: Mar 2011 Posts: 8 Thanks: 0 Exponent Question Greetings, Is -x^2 equal to -(x^2) or (-x^2)? Thanks, DR
 March 12th, 2011, 01:48 PM #2 Senior Member   Joined: Nov 2010 Posts: 502 Thanks: 0 Re: Exponent Question Both. By sticking parenthesis around it, you haven't changed anything. I will assume you were asking about (-x)^2 --> but it's not equal to that.
 March 12th, 2011, 01:58 PM #3 Newbie   Joined: Mar 2011 Posts: 8 Thanks: 0 Re: Exponent Question Maybe I was unclear... Let's take for example: -4^2 That cannot be equal to both -(4^2) and (-4^2), because the first yields -16 while the second yields 16. Thanks, DR
March 12th, 2011, 02:35 PM   #4
Global Moderator

Joined: May 2007

Posts: 6,807
Thanks: 717

Re: Exponent Question

Quote:
 Originally Posted by duncanrager Maybe I was unclear... Let's take for example: -4^2 That cannot be equal to both -(4^2) and (-4^2), because the first yields -16 while the second yields 16. Thanks, DR
You seem to misunderstand parentheses. The only way to get 16 and not -16 is to parentheses before squaring, that is (-4)^2. -4^2=-16, putting ( ) around it afterward doesn't change anything.

 March 12th, 2011, 02:56 PM #5 Newbie   Joined: Mar 2011 Posts: 8 Thanks: 0 Re: Exponent Question OK gotcha, So then to be clear: -4^2 = -(4*4) and NOT (-4 * -4)?
 March 12th, 2011, 05:23 PM #6 Senior Member   Joined: Apr 2007 Posts: 2,140 Thanks: 0 Correct.

 Tags exponent, question

 Thread Tools Display Modes Linear Mode

 Similar Threads Thread Thread Starter Forum Replies Last Post Kiphyl Algebra 5 December 30th, 2013 11:09 PM mrwolf Elementary Math 2 May 9th, 2013 03:33 AM daigo Algebra 8 July 14th, 2012 05:42 PM xnarutox Algebra 8 October 7th, 2010 06:41 PM AA Duracell Number Theory 12 January 26th, 2009 01:48 PM

 Contact - Home - Forums - Cryptocurrency Forum - Top