Question

If X=√2 +1 find (X-1/X)2.

Answer 1

Answer:

2

Step-by-step explanation:

• X=√2+1
• According to question,
• =[(√2+1)-1/(√2+1)]²
• =[(√2+1)²+(1/√2+1)²-2×√2+1×1/√2+1
• =[(3+1/3)-2]
• =[9+3/3-2]
• =[12/3-2]
• =[4-2]
• = 2

Hope the answer will help you.