(a+b+c)²-4a-4b+4=0,则a+b+c的值 A.-1 B.1 C.2 D.3

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(a+b+c)²-4a-4b+4=0,则a+b+c的值A.-1B.1C.2D.3(a+b+c)²-4a-4b+4=0,则a+b+c的值A.-1B.1C.2D.3(a+b+c)&su

(a+b+c)²-4a-4b+4=0,则a+b+c的值 A.-1 B.1 C.2 D.3
(a+b+c)²-4a-4b+4=0,则a+b+c的值 A.-1 B.1 C.2 D.3

(a+b+c)²-4a-4b+4=0,则a+b+c的值 A.-1 B.1 C.2 D.3
是不是应该是(a+b+c)²-4a-4b-4c+4=0?
(a+b+c)²-4(a+b+c)+4=0
(a+b+c-2)²=0
a+b+c-2=0
a+b+c=2
选C