Question

if x square + 1 upon x square is equals to 27 find the value of x minus one upon x

Answer 1

X²+1/x²=27
Now,
(X-1/X)²=x²-2(X)(1/X)+(1/X)²
(x-1/x)²=x²+1/x²-2
Since x²+1/x²=27
Therefore
(x-1/x)²=27-2
(x-1/x)²=25
x-1/x=√25
=5
Ans-5

Answer 2

Answer:

Step-by-step explanation:

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Salil75

Secondary School Math 5+3 pts

If x square + 1 upon x square is equals to 27 find the value of x minus one upon x

Report by Anmol552 26.07.2018

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Salil75

Salil75Helping Hand

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Modaknishant123Ambitious

X²+1/x²=27

Now,

(X-1/X)²=x²-2(X)(1/X)+(1/X)²

(x-1/x)²=x²+1/x²-2

Since x²+1/x²=27

Therefore

(x-1/x)²=27-2

(x-1/x)²=25

x-1/x=√25

=5

Ans-5