Question

if a = 1 + √2 find the value of ( a-1/a)^2​

Answer 1

Answer:

a=1-√2

1/a=1/(1-√2)

or, 1/a=(1+√2)/(1-√2)(1+√2)

or, 1/a=(1+√2)/(1-2)

or, 1/a=-(1+√2)

∴, (a-1/a)³=[(1-√2)-{-(1+√2)}]³=(1-√2+1+√2)³=2³=8

Step-by-step explanation:

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Answer 2

Answer:

(a-1/a)²=4

Step-by-step explanation:

Please see the following attachment

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