Question

Please Solve this Question.​

Answer 1

Answer:

The value is

$3 \ - \frac{9}{18}$

so 9 ÷ 18 = 2

therefore

$\frac{2}{3}$

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Answer 2

Answer:

108 + 76√2

Step-by-step explanation:

It is given that, x — 1/x = 3 + 2√2

SO, x³ — (1/x)³ = (x — 1/x)³ + 3(x — 1/x)

= (3 + 2√2)³ + 3(3 + 2√2)

By using the formula, (a +b)³ = a³ + b³ + 3ab(a+b)

= (3)³ + (2√2)³ + 3(3)(2√2)(3 + 2√2) + 3(3 + 2√2)

=27 +16√2 +54√2 +72+9+6√2

= 108 + 76√2