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计算:1 /( 6x-4y ) - 2y / (6x-4y ) - 3x / (4y²-6x²)
原式=(1-2y)/[2(3x-2y)]+3x/[2(3x²-2y²)
=[(1-2y)(3x²-2y²)+3x(3x-2y)]/[2(3x-2y)(3x²-2y²)]
=[(3x²-2y²-6yx²+4y³)+(9x²-6xy)]/[2(3x-2y)(3x²-2y²)]
=[4y³-2y²-6xy(x+1)+12x²]/[2(3x-2y)(3x²-2y²)]
原式=(1-2y)/[2(3x-2y)]+3x/[2(3x²-2y²)
=[(1-2y)(3x²-2y²)+3x(3x-2y)]/[2(3x-2y)(3x²-2y²)]
=[(3x²-2y²-6yx²+4y³)+(9x²-6xy)]/[2(3x-2y)(3x²-2y²)]
=[4y³-2y²-6xy(x+1)+12x²]/[2(3x-2y)(3x²-2y²)]
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展开全部
1 /( 6x-4y ) - 2y / (6x-4y ) - 3x / (4y²-6x²)
=(1-2y)/[2(3x-2y)]+3x/[2(3x²-2y²)
=[(1-2y)(3x²-2y²)+3x(3x-2y)]/[2(3x-2y)(3x²-2y²)]
=[(3x²-2y²-6yx²+4y³)+(9x²-6xy)]/[2(3x-2y)(3x²-2y²)]
=[4y³-2y²-6xy(x+1)+12x²]/[2(3x-2y)(3x²-2y²)]
=(1-2y)/[2(3x-2y)]+3x/[2(3x²-2y²)
=[(1-2y)(3x²-2y²)+3x(3x-2y)]/[2(3x-2y)(3x²-2y²)]
=[(3x²-2y²-6yx²+4y³)+(9x²-6xy)]/[2(3x-2y)(3x²-2y²)]
=[4y³-2y²-6xy(x+1)+12x²]/[2(3x-2y)(3x²-2y²)]
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