Question

If x=√5+2 then x-1/x equals​

Answer 1

Answer:

GIVEN.

x=√5+2

NOW,

x-2=√5

SQUARING BOTH SIDE,

(x-2)² = (√5)²

→ x² + 4 - 4x = 5

→x² - 4x -1 = 0

→x2 - 1 = 4x

DIVIDING BY X BOTH SIDE WE GET,

= x - 1/x = 4.ans

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