将(x+2y)2-(x-2y)2分解因式的结果是( )A.-8x2B.-8x(x-2y)C.16(x+y)D.8xy
题型:单选题难度:一般来源:不详
将(x+2y)2-(x-2y)2分解因式的结果是( )A.-8x2 | B.-8x(x-2y) | C.16(x+y) | D.8xy |
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答案
原式=[(x+2y)+(x-2y)][(x+2y)-(x-2y)], =2x•4y, =8xy, 故选D. |
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