Simplify 4+root5 by 4-root5 - 4-root5 by 4+root5
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Answer:16√5
Step-by-step explanation:
4+√5/4-√5 - 4-√5/4+√5
rationalise then you will get
(4+√5)^2/11 - (4-√5)^2/11
= 4(4)(√5)
= 16√5
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