(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()
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(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()
(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()
(1)a²-a-1=a²-()
(2)a ²-2a+2=a²-2()
(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()(1)a²-a-1=a²-() (2)a ²-2a+2=a²-2()
a+1
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