若|a|+a=0,|ab|=ab,则化简根号下b²-根号下a²+2ab+b²+根号下a²=
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若|a|+a=0,|ab|=ab,则化简根号下b²-根号下a²+2ab+b²+根号下a²=
若|a|+a=0,|ab|=ab,则化简根号下b²-根号下a²+2ab+b²+根号下a²=
若|a|+a=0,|ab|=ab,则化简根号下b²-根号下a²+2ab+b²+根号下a²=
|a|+a=0,a≤0
|ab|=ab,b≤0
根号下b²-根号下a²+2ab+b²+根号下a²
=-b-(-a-b)-a
=-b+a+b-a
=0