题目内容：

根号-5x的三次y的四次,化简这个二次根式

优质解答

答:√[(-5x)³y^4] (y^4在根号里面)
=√[(-5x)²(-5x)y^4]
=-(5x)y²√(-5x)
=-5xy²√(-5x)
√(-5x)³y^4 (y^4在根号外面)
=√(-5x)²(-5x)y^4
=-5xy^4√(-5x)