Question

计算：（-34x3y2）3?（2xy2）2-（-12x4y3）2?x3y4

计算：（-34x3y2）3?（2xy2）2-（-12x4y3）2?x3y4．

Answer 1

（-

3

4

x³y²）³?（2xy²）²-（-

1

2

x⁴y³）²?x³y⁴
=-

27

64

x⁹y⁶?4x²y⁴-

1

4

x⁸y⁶?x³y⁴
=-

27

16

x¹¹y¹⁰-

1

4

x¹¹y¹⁰
=-

31

16

x¹¹y¹⁰．