Math, asked by shivaramtheja, 8 months ago

please fast answer my question ​

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Answers

Answered by VATSALJOSHI
1

Answer:

Answe is 81

Step-by-step explanation:

because square of 9 is 81

Answered by superhero123X
2

Answer:

Square both sides

Step-by-step explanation:

(x2 + 1/x2)2 = 9^2

x4 + 1/x4 +2 = 81

thus x4 + 1/x4 = 81-2= 79

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