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If x^2 + 1/x^2 = 171, what is the positive value of x - 1/x?

 Apr 13, 2022

Best Answer 

 #1
avatar+2403 
+1

a = x - 1/x

a^2 = x^2 - 2 + 1/x^2

x^2 + 1/x^2 = 171

a^2 = 171 - 2

a^2 = 169

\(a = \pm 13\)

 

 

=^._.^=

 Apr 13, 2022
 #1
avatar+2403 
+1
Best Answer

a = x - 1/x

a^2 = x^2 - 2 + 1/x^2

x^2 + 1/x^2 = 171

a^2 = 171 - 2

a^2 = 169

\(a = \pm 13\)

 

 

=^._.^=

catmg Apr 13, 2022
 #2
avatar+115 
0

That is correct  cat Long time u havent been on

 Apr 13, 2022
 #3
avatar+2403 
0

Yep, in person school has been quite busy. :((

I wish I could be on more.

 

=^._.^=

catmg  Apr 13, 2022
 #4
avatar+115 
0

well glad you are here today

Kakashi  Apr 13, 2022
 #5
avatar+2403 
0

It's nice to see you too. :))

 

=^._.^=

catmg  Apr 13, 2022
 #6
avatar+115 
-1

Thank you

coolcoolcool

Kakashi  Apr 13, 2022
 #7
avatar+2455 
+1

If you're comfortable Cat, what grade are you in?

 

I'm in 7th btw.

BuilderBoi  Apr 13, 2022
edited by BuilderBoi  Apr 13, 2022
 #8
avatar+115 
-2

You talking to Me?

Kakashi  Apr 13, 2022
 #9
avatar+2455 
+1

The message wasn't directed to you, it was to catmg. 

 

You already said you were in 7th grade like me :)

BuilderBoi  Apr 13, 2022
 #10
avatar+115 
-2

oh kk

Kakashi  Apr 13, 2022

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