dont spam answer fast
Attachments:
Answers
Answered by
1
Answer:
29
Step-by-step explanation:
(x+1/x)^2
x^2 + (1/x)^2 + 2
27+2
29
Answered by
1
x²+1/x²=27
adding 2 on both sides we get
x²+1/x²+2=29
now it is in the form of
a²+b²+2ab which is equal to (a+b) ²
Therefore,
(x+1/x) ²=29
x+1/x=√(29)
similarly
subtracting both sides by 2 we get
x²+1/x²-2=25
(x-1/x) ²=25
x-1/x=√(25)
=5
Similar questions