if x=4-√5 then find (x+1/x)^2 - (x-1/x)^2
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answer 4 I hope this works..
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hey here is your answr....
(4-√5+1 /x) ^2 - (4-√5-1 /x) ^2
{4-√5+1 /x (4- √5-1/x)} ×{4-√5+1 /x+(4-√5- 1 /x)}
(4-√5+1 /x-4√5+1/x) ×(4-√5+1 /x+ 4-√5- 1x)
2/x × (8-2√5)
2/x ×2(4-√5)
2× 2 /x( 4-√5)
=...... 4/x(4-√5)....
THANK Uu...
(4-√5+1 /x) ^2 - (4-√5-1 /x) ^2
{4-√5+1 /x (4- √5-1/x)} ×{4-√5+1 /x+(4-√5- 1 /x)}
(4-√5+1 /x-4√5+1/x) ×(4-√5+1 /x+ 4-√5- 1x)
2/x × (8-2√5)
2/x ×2(4-√5)
2× 2 /x( 4-√5)
=...... 4/x(4-√5)....
THANK Uu...
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