Question

计算：4x²y³÷（-

1

2

xy）²=______．

Answer 1

4x²y³÷（-

1

2

xy）²，
=4x²y³÷

1

4

x²y²，
=（4÷

1

4

）x^2-2y^3-2，
=16y．
故应填：16y．