计算[(3x——2y)(3x+2y)—(x+2y)(5x—2y)]除以4x
人气:227 ℃ 时间:2019-12-18 19:47:06
解答
[(3x——2y)(3x+2y)—(x+2y)(5x—2y)]/4x =(9x^ 2-4y^ -5x^ 2+4y^ 2)/4x =4x^ 2/4x =x
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