Question

If x²+1=3z then,(x^4+x^-2)/(x^2+5x+1) is​

Answer 1

Answer:

I don't understand it sorry

Answer 2

Answer:

f(x)=x  

2

−5x+1

f(2)=2  

2

−5×2+1

=4−10+1

=−6+1

=−5

f(−1)=(−1)  

2

−5×−1+1

=1+5+1

=7

f(  

3

1

​  

)=  

3

1

​  

 

2

−5×  

3

1

​  

+1

=  

9

1

​  

−  

3

5

​  

+1

=  

9

1

​  

−  

9

15

​  

+  

9

9

​  

 

=  

9

10−15

​  

 

=  

9

−5

​  

 

f(2)−f(−1)+f(  

3

1

​  

)=−5−7−  

9

5

​  

 

=−12−  

9

5

​  

 

=  

9

−108−5

​  

 

=−  

9

113