作业帮2{(根号a-1)+根号(b+2)+根号c+1)]=a+b+c+5,求a+b+c,
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![2{(根号a-1)+根号(b+2)+根号c+1)]=a+b+c+5,求a+b+c,](/uploads/image/z/13135360-40-0.jpg?t=2%7B%28%E6%A0%B9%E5%8F%B7a-1%29%2B%E6%A0%B9%E5%8F%B7%28b%2B2%29%2B%E6%A0%B9%E5%8F%B7c%2B1%29%5D%3Da%2Bb%2Bc%2B5%2C%E6%B1%82a%2Bb%2Bc%2C)
2{(根号a-1)+根号(b+2)+根号c+1)]=a+b+c+5,求a+b+c,
2{(根号a-1)+根号(b+2)+根号c+1)]=a+b+c+5,求a+b+c,
2{(根号a-1)+根号(b+2)+根号c+1)]=a+b+c+5,求a+b+c,
a+b+c+5-2[根号(a-1)+根号(b+2)+根号(c+1)] = [a-1 -2根号(a-1) +1] + [b+2 -2根号(b+2) +1] + [c+1 -2根号(c+1) +1] = [根号(a-1) -1]^2 + [根号(b+2) -1]^2 + [根号(c+1) +1]^2 = 0
a=1
b=-2
c=-1
a+b+c=-2
a=1
b=-2
c=-1
a+b+c=-2 x