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数学
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当x=-1/3时,【十万火急!】化简求值:(9x^2y-6xy^2)÷(-3xy)-【(4y^2-9x^2)/(-3x+2y)】
人气:176 ℃ 时间:2019-08-19 06:51:48
解答
(9x^2y-6xy^2)÷(-3xy)-【(4y^2-9x^2)/(-3x+2y)】
=-3x+2y-【(2y-3x)(2y+3x)÷(-3x+2y)】
=-3x+2y-2y-3x
=-6x
=-6 × (-1/3)
=2
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