Verified answer

Answer:

336

Step-by-step explanation:

x^2 + 1/x^2 = 47

then x^3+1/x^3 = (x+1/x)×(x^2 +1/x^2 +x×1/x)..........(1)

by using formula a^3+b^3=(a+b)×(a^2+b^2+a×b)

(x+1/x)^2=x^2 + 1/x^2+2×x×1/x=47+2 =49

(x+1/x)=sq root 49 = 7 ....(2)

by (1) and (2)

we get x^3+1/x^3= 7×(47+1)=7×48=336

ans 336 done

Answer:

Step-by-step explanation: