Question

Please try to solve this.... Maths grade 9
This is a mcq question ​

Answer 1

Answer:

The answer is option D. 3

Step-by-step explanation:

I did it but writing here is tough so I'll just tell the method to do it...

Anyways the last answer I got is option D 3.

First

You need to cube the first given equation so you'll get the value of x^3+1/x^3.

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

you'll get x^3 + 1/x^3 = 8 + 3(x+1/x)

Second

You need to substitute the value of it in the value of what is asked.

then the 3(x+1/x) and -3(x+1/x) will go to 0

so you'll get the answer = root of 9 which is 3

Hope this helps...

KINDLY DO MARK AS BRAINLIEST!!!