Question

If x = 3 - √8, then find the value of x3 +1/x³​

Answer 1

Question-

If x = 3 - √8, then find the value of x × 3 +1/x³​.

Answer-

$=3-3\sqrt{8} +\frac{1}{9-\sqrt{8^3}-27\sqrt{8}-27 }$

Explanation-

$x \times 3 +1/x^3$

$=3 - \sqrt{8}\times3+\frac{1}{(3 - \sqrt{8})^3}$

$=3-3\sqrt{8} +\frac{1}{9-\sqrt{8^3}-3\times3\times\sqrt{8}(3-\sqrt{8}) }$

$=3-3\sqrt{8} +\frac{1}{9-\sqrt{8^3}-9\sqrt{8}(3-\sqrt{8}) }$

$=3-3\sqrt{8} +\frac{1}{9-\sqrt{8^3}-27\sqrt{8}-27 }$

Answer 2

Answer:

If x = 3 - √8, then find the value of x × 3 +1/x³​.

Step-by-step explanation:

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