Question

If x²+1/x²=27, then find the value of x³-1/x³।

Answer 1

Answer:

-131.5745

Step-by-step explanation:

given, ( x^2 + 1 ) ÷ x^2. = 27

27 x^2 - x^2 - 1 =0

26 x^2 = 1

( x )^2 = ( 1 ÷ √ 26 ) ^2

x = 1 ÷ √ 26

now , ( x^3 - 1 ) ÷ x^3

= -131.5745 ( by putting value of x )

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