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x=3/2 y=-2 化简x-2(1/4x-1/3y²)+(-3/2x+1/3y²),在求职
人气:461 ℃ 时间:2020-02-05 06:35:35
解答
x=3/2 y=-2 化简x-2(1/4x-1/3y²)+(-3/2x+1/3y²)
=x-1/2x+2/3y²-3/2x+1/3y²
=-x+y²
=-3/2+(-2)²
=-3/2+4
=5/2
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