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Question: What is the built-in algorithm used in "fsolve"

Question:What is the built-in algorithm used in "fsolve"

JuanXu 10 Maple
fsolve newton iteration
August 27 2017
2

I wonder what the built-in algorithm is used in "fsolve". From some references, it seems to be Newton iteration. 
But fsolve succeeds to quickly find a root of multiplicity more than 1, which can't be achieved by Newton iteration. So I wonder whether there are other techniques involved? Thank you!
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