(x-y)(x+y)( )=x的四次方-2x的二次方y的二次方+y的四次方_数学解答

(x-y)(x+y)( )=x的四次方-2x的二次方y的二次方+y的四次方

人气：203 ℃　时间：2019-10-19 05:52:16

解答

x⁴-2x²y²+y⁴=(x²-y²)²=[(x+y)(x-y)]²=(x-y)²(x+y)²(x-y)(x+y)( (x-y)(x+y) )=x⁴-2x²y²+y⁴