Question

If x=2+√5 find the value of x-1/x

Answer 1

Step-by-step explanation:

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Answer 2

Step-by-step explanation:

2+√5 - 1/2+√5

A-B

B = 1/2+✓5 × 2-√5/2-√5

B = 2-√5 / 4-5

B = 2-√5/-1

B = -(2-√5)

B = -2+√5

A - B

2+√5-(-2+√5)

2+√5+2-√5

2+2

4 is the answer