Question

if X square + 1 by x square equals to 18 then find out x cube minus one by x cube​

Answer 1

Answer:

x'2+1/x'2= 18

(x-1/x)'2 = x'2+1/x'2-2×x×1/x

(x-1/x)'2= 18-2

x-1/x=√16=4

(x-1/x)'3=x'3-1/x'3-3×x×1/x(x-1/x)

(4)'3=x'3-1/x'3-3×4

64=x'3-1/x'3-12

64+12 = x'3-1/x'3

76= x'3-1/x'3

Step-by-step explanation:

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