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(2003•青海)分解因式a3-a=________;在函数中,自变量x的取值范围是___...
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(2003•青海)分解因式a
3-a=________;在函数
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7POEr1TqDxLjeKNPqhB/AAAAAElFTkSuQmCC
)
中,自变量x的取值范围是________.
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A.(a+b)(a-b)=a2-b2
B.![](data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAF8AAAAjCAYAAADyrNZPAAAAAXNSR0IArs4c6QAAAARnQU1BAACx
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zkf2xWiGIzDg4zixtBrwWbDiXjrg4zixtPoD8V1s12fw4lUAAAAASUVORK5CYII=
)
C.a2+ab-2b2=(a-b)(a+2b)
D.a3-a2-a+1=(a-1)(a+1)2
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A.(a+b)(a-b)=a2-b2
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jwv8YQUAAAAJcEhZcwAADsMAAA7DAcdvqGQAAAI3SURBVGhD7ZqBrYQgDIaZjJ1Yx2UYhVF4FjkU
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zkf2xWiGIzDg4zixtBrwWbDiXjrg4zixtPoD8V1s12fw4lUAAAAASUVORK5CYII=
)
C.a2+ab-2b2=(a-b)(a+2b)
D.a3-a2-a+1=(a-1)(a+1)2