已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-5xy(x-y)的值

来源:学生作业帮助网 编辑:六六作业网 时间:2024/12/04 02:45:16
已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-5xy(x-y)的值已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-

已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-5xy(x-y)的值
已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-5xy(x-y)的值

已知x=6.61,y=-3.39,球(x-y)(x²+3xy+y²)-5xy(x-y)的值
(x-y)(x²+3xy+y²)-5xy(x-y)
=10(x²+3xy+y²)-5xy*10
=10(x^2-2xy+y^2)
=10(x-y)^2
=1000

是(x-y)的三次方,也就是10的三次方,1000