If |a+b|=10√3 and |a-b|=10 then what is the value of √a square +b square =?

If |a+b|=10√3 and |a-b|=10 then what is the value of √a square +b

1.	If \|a+b\|=10√3 and \|a-b\|=10 then what is the value of √a square +b square =?
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