please answer this question its very important
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There's a printing mistake in the question.Let me show you why.
(x + 1/x)² = x² + 1/x² + 2
and, (x - 1/x)² = x² + 1/x² - 2
We don't have the value of x² + 1/x².
In the question, it is given x² + 1/x = 27.
Assuming that it's the printing mistake but the value was meant to be written for x² + 1/x², we can say that
(x +1/x)² = 27+2 = 29⇒ x + 1/x = √29
(x - 1/x)² = 27-2 = 25⇒ x - 1/x = 5
Now check the answer from your book. If the answer is correct, then I am right about the printing mistake, and if its wrong, then the value is given wrong, because this method is absolutely correct.
(x + 1/x)² = x² + 1/x² + 2
and, (x - 1/x)² = x² + 1/x² - 2
We don't have the value of x² + 1/x².
In the question, it is given x² + 1/x = 27.
Assuming that it's the printing mistake but the value was meant to be written for x² + 1/x², we can say that
(x +1/x)² = 27+2 = 29⇒ x + 1/x = √29
(x - 1/x)² = 27-2 = 25⇒ x - 1/x = 5
Now check the answer from your book. If the answer is correct, then I am right about the printing mistake, and if its wrong, then the value is given wrong, because this method is absolutely correct.
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