What is ∜25 - √45 + √80

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`root(4)25 -sqrt(45)+sqrt(80)`

This can be written as,

`= root(4)(5^2) -sqrt(3^2 xx 5)+sqrt(4^2 xx 5)`

`= sqrt(5) -3sqrt(5)+4sqrt(5)`

`= 2sqrt(5)`

Therefore,

`root(4)25 -sqrt(45)+sqrt(80) = 2sqrt(5)`

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