Question

if x plus one upon X equals to root 2 then evaluate x cube + 1 upon x cube ​

Answer 1

Answer:-√2

Step-by-step explanation:

X+1/x=√2

(X+1/x)^3=(√2)^3

(X+1/x)^3=2√2

(a+b)^3=a^3+b^3+3ab(a+b)

x^3+1/x^3+3x×1/x(x+1/x)=2√2

x^3+1/x^3+3(√2)=2√2

x^3+1/x^3=-√2