(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)²-y(y+4x)-8x]÷2x.
(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)²-y(y+4x)-8x]÷2x.
(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