(1)计算:(-3xy)²·2x³÷(-6x² y); (2)化简:[(2x+y)
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(1)计算:(-3xy)²·2x³÷(-6x² y); (2)化简:[(2x+y)²-y(y+4x)-8x]÷2x.
![(1)计算:(-3xy)²·2x³÷(-6x² y); (2)化简:[(2x+y)](/uploads/image/z/16334744-32-4.jpg?t=%281%29%E8%AE%A1%E7%AE%97%3A%28-3xy%29%26%23178%3B%C2%B72x%26%23179%3B%C3%B7%28-6x%26%23178%3B+y%29%3B+%282%29%E5%8C%96%E7%AE%80%EF%BC%9A%5B%282x%2By%29%26%2317)
(1)计算:(-3xy)²·2x³÷(-6x² y);
=9x²y²×2x³÷﹙-6x²y﹚
=-3/2x³y
(2)化简:[(2x+y)²-y(y+4x)-8x]÷2x.
=(4x²+4xy+y²-y²-4xy-8x)÷2x
=(4x²-8x)÷2x
=2x-4
=9x²y²×2x³÷﹙-6x²y﹚
=-3/2x³y
(2)化简:[(2x+y)²-y(y+4x)-8x]÷2x.
=(4x²+4xy+y²-y²-4xy-8x)÷2x
=(4x²-8x)÷2x
=2x-4
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