18X²(x-2y)²-24xy(2y-x)²-6x(2y-x)³
=18X²(x-2y)²-24xy(x-2y)²+6x(x-2y)³
=6x(x-2y)²(3x-4y+x-2y)
=6x(x-2y)²(4x-6y)
=12x(x-2y)²(2x-3y)
=12x(-3)x(-3+2x1)²(-3x2+3x1)
=-36x1x(-3)
=108
如果本题有什么不明白可以追问,
先分解因式后求值,18X²(x-2y)²-24xy(2y-x)²-6x(2y-x)³ x=-3 y=-1
先分解因式后求值,18X²(x-2y)²-24xy(2y-x)²-6x(2y-x)³ x=-3 y=-1
数学人气:831 ℃时间:2020-02-06 00:17:01
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