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Question 596559: can you show me the answer for
9Nsquared=729 and how it is solved please ?
Answer by rapaljer(4671)   (Show Source):
You can put this solution on YOUR website! 
First, divide both sides of this equation by 9:
This is basically to find a number that you can square and end up with 81. Of course, the answer is N=9, or N=-9.
For additional explanation on SOLVING QUADRATIC EQUATIONS, please see my own website. The easiest way to find it is to use the easy to spell and easy to remember link www.mathinlivingcolor.com. On this single page website, there is a link at the bottom of the page that takes you to my Homepage.
Near the top of my homepage, look for the link "Basic, Intermediate, and College Algebra: One Step at a Time", and choose Intemediate Algebra (Chapter 4.02). There you will find explanations that may be easier to understand than your traditional textbooks, and many of the exercises from these sections are solved in color on the "MATH IN LIVING COLOR" pages that go with these sections.
If you like my website, please tell your friends and family. It's all FREE. You can contact me by Email at rapaljer@seminolestate.edu.
Dr. Robert J. Rapalje, Retired
Professor of Mathematics
Seminole State College of Florida
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