Question

Give me thw full solution of this question ... The question is in the image..

Answer 1

x - 1/x = root 21
Squaring:
(x - 1/x)^2 = 21
x^2 + 1/x^2 - 2 = 21
x^2 + 1/x^2 = 23...(i)

Now, (x+1/x)^2 = x^2 + 1/x^2 + 2
(x + 1/x)^2 = 23 + 2 = 25
Square root:
(x+1/x) = 5
Hence,
(x^2+1/x^2)*(x+1/x) = 23*5 = 115
Hope it helps

Answer 2

refer the pic..
hope it'll help..
mark it as brainliest..