已知实数a,b满足√a-1+√b+2=0,求a ,b,√-ab.如题

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已知实数a,b满足√a-1+√b+2=0,求a,b,√-ab.如题已知实数a,b满足√a-1+√b+2=0,求a,b,√-ab.如题已知实数a,b满足√a-1+√b+2=0,求a,b,√-ab.如题两

已知实数a,b满足√a-1+√b+2=0,求a ,b,√-ab.如题
已知实数a,b满足√a-1+√b+2=0,求a ,b,√-ab.
如题

已知实数a,b满足√a-1+√b+2=0,求a ,b,√-ab.如题
两个非负数相加=0必须各自为0
所以a=1 b=-2
√-ab=√2

√a-1=0,√b+2=0,故a=1,b=-2,√-ab.=√2

a-1=0,b+2=0
a=1,b=-2
√-ab=√2