If x + 1/x = 5, what is the value of x² + 1/x²?
- 21
- 22
- 23
- None of these
Explanation
Formula: (x + 1/x)^2 = x^2 + 1/x^2 + 2
So
x^2 + 1/x^2 = (x + 1/x)^2 - 2
= 5^2 - 2
= 25 - 2
= 23
Last verified on 20-10-2026
Related MCQs
- 8
- 9
- 10
- 11
اس سوال کو وضاحت کے ساتھ پڑھیں
