2(x²-1)=4还有一题:已知|x-5|+|y+4|=0求(x+y)2012
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![2(x²-1)=4还有一题:已知|x-5|+|y+4|=0求(x+y)2012](/uploads/image/z/2743466-50-6.jpg?t=2%28x%26%23178%3B-1%29%3D4%E8%BF%98%E6%9C%89%E4%B8%80%E9%A2%98%EF%BC%9A%E5%B7%B2%E7%9F%A5%7Cx-5%7C%2B%7Cy%2B4%7C%3D0%E6%B1%82%EF%BC%88x%2By%EF%BC%892012)
2(x²-1)=4还有一题:已知|x-5|+|y+4|=0求(x+y)2012
2(x²-1)=4
还有一题:已知|x-5|+|y+4|=0求(x+y)2012
2(x²-1)=4还有一题:已知|x-5|+|y+4|=0求(x+y)2012
2(x²-1)=4
(x²-1)=2
x²=3
x=±√3
已知|x-5|+|y+4|=0求(x+y)2012
x-5=0,x=5
y+4=0,y=-4
x+y=5-4=1
(x+y)^2012=1^2012=1
望采纳
x^2-1=2
x^2=3
x=±√3
x=5,y=-4
代入
=2012x(5-4)
=2012