(a-1)²+b²+4b+4=0,求ab的值
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(a-1)²+b²+4b+4=0,求ab的值
(a-1)²+b²+4b+4=0,求ab的值
(a-1)²+b²+4b+4=0,求ab的值
(a-1)²+b²+4b+4=0
(a-1)²+(b+2)²=0
所以
(a-1)²-0,(b+2)²=0
a-1=0,b+2=0
a=1,b=-2