先分解因式后求值,18X²(x-2y)²-24xy(2y-x)²-6x(2y-x)
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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)](/uploads/image/z/18378442-10-2.jpg?t=%E5%85%88%E5%88%86%E8%A7%A3%E5%9B%A0%E5%BC%8F%E5%90%8E%E6%B1%82%E5%80%BC%2C18X%26%23178%3B%EF%BC%88x-2y%EF%BC%89%26%23178%3B-24xy%EF%BC%882y-x%EF%BC%89%26%23178%3B-6x%282y-x%29%26%2317)
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,
=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,
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