Question

x² + 2 + 1/x² I equal to
1) (x +2x)²
2) ( x-2/x)²
3) (x+1/x)²​

Answer 1

Answer:

The correct option is (3) i.e (x+1/x)².

Step-by-step explanation:

if we expand this by using formula (a+b)²

which is equal to a² + b² + 2ab.

Now,

(x+1/x)² = x² + 1/x² + 2.x.1/x

= x² + 2 + 1/x²

Answer 2

Answer:

{3} (x + 1/x)^2

Step-by-step explanation:

(x + 1/x)^2 = x² + 2 + 1/x² (by [a+b]² = a² + b² + 2ab