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The people who are more confident have more to make themselves successful.A. education B. chanc...
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教案备课库《unit 7 section B1》真题及答案
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已知a+b=2求a2+ab+b2的值.
下列因式分解正确的是
下列二次根式中与是同类二次根式的是
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计算﹣12.
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已知a+b=2则a2﹣b2+4b的值是.
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下面是某同学对多项式x2-4x+2·x2-4x+6+4进行因式分解的过程.解设x2-4x=y.原式=y+2y+6+4第一步=y2+8y+16第二步=y+42第三步=x2-4x+42第四步.回答下列问题1该同学解题过程中从第二步到第三步运用了因式分解的A.提取公因式B.平方差公式C.两数和的完全平方公式D.两数差的完全平方公式2该同学因式分解的结果是否彻底.填彻底或不彻底若不彻底请直接写出因式分解的最后结果.3请你模仿以上方法尝试对多项式x2-2x·x2-2x+2+1进行因式分解.
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