5(x-y)的平方-8(x-y)的三次方+(x-y)的平方与5(x-y)的平方+6(x-y)三次方的差

问题描述:

5(x-y)的平方-8(x-y)的三次方+(x-y)的平方与5(x-y)的平方+6(x-y)三次方的差

5(x-y)的平方-8(x-y)的三次方+(x-y)的平方与5(x-y)的平方+6(x-y)三次方的差=5(x-y)²-8(x-y)³+(x-y)² - [5(x-y)²+6(x-y)³]=5(x-y)²-8(x-y)³+(x-y)² - [5(x-...