(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5

来源:学生作业帮助网 编辑:作业帮 时间:2024/03/28 19:57:18
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5

(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5

(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
=(x-y)^3×(x-y)^4+(x-y)^2×[-(x-y)]^5
=(x-y)^7-(x-y)^7
=0

(x-y)^3×(y-x)^4+(x-y)^2×(y-x)^5
=(x-y)^3×(x-y)^4-(x-y)^2×(x-y)^5
=(x-y)^7-(x-y)^7
=0