Question

3y-1/3y=7,find 9y²+1/9y²​

Answer 1

Answer:

51

Step-by-step explanation:

$( {3y - \frac{1}{3y}) }^{2} = 9 {y}^{2} + \frac{1}{9 {y}^{2} } - 2$

=>

${7}^{2} = 9 {y}^{2} + \frac{1}{9 {y}^{2} } - 2$

therefore required solution is

$49 + 2 = 51$

Answer 2

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