Question

If 2(x² + 1) = 5x, find: x-1/x and x³/1/x³

please tell the answer fast
*no spammers allowed*​

Answer 1

Answer:

Displacement reactions occur when a metal from the electrochemical series is mixed with the ions of a metal lower down in the electrochemical series. The atoms of the more reactive metal push their electrons on to ions of the less reactive metal. An example can be seen below.

Answer 2

(x2+1)=5x

=>xx2+1=25

=>x+x1=25

Squaring both sides,

=>x2+x21+2(x)+(x1)=425

=>x2+x21=425−2

=>x2+x21=417

Now,

(x−x21)2=x2+x21−2(x)+(