Question

If y² +  1/²= 18 then find value of y - 1/​

Answer 1

Answer:

4

Step-by-step explanation:

${y }^{2} + \frac{1}{ {y}^{2} } = 18 \\ {y}^{2} + \frac{1}{ {y}^{2} } - 2 = 18 - 2 = 16 \\ ( {y - \frac{1}{y} })^{2} = {4 }^{2} \\ y - \frac{1}{4} = 4$

Answer 2

I think answer is 4

Step-by-step explanation:

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