+0  
 
0
148
1
avatar+4690 

Help 1 

 Feb 28, 2018
 #1
avatar+15350 
+1

Let's do it this way.....let  x= n^2

Substitute:

 

x^2 -11x+30 / x^2-7x+10      factor top and bottom

 

(x-6)(x-5)  / (x-2)(x-5)           Now put the n's back in

 

(n^-6)(n^2-5) / (n^2-2)(n^2-5)      Now you can see that n^2 cannot equal 2 or 5

                                                            so n cannot equal +-sqrt2  or +- sqrt 5

 

cancel out the (n^2-5) in num and denom

 

(n^2-6) / (n^2-2)

 Feb 28, 2018

5 Online Users

New Privacy Policy

We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive information about your use of our website.
For more information: our cookie policy and privacy policy.