来自秦岚的问题
a,b互为相反数,则a(x-2y)-b(2y-x)的值为______.
a,b互为相反数,则a(x-2y)-b(2y-x)的值为______.
1回答
2020-06-15 17:04
a,b互为相反数,则a(x-2y)-b(2y-x)的值为______.
a,b互为相反数,则a(x-2y)-b(2y-x)的值为______.
因为a,b互为相反数,所以a+b=0,
所以a(x-2y)-b(2y-x)
=a(x-2y)+b(x-2y)
=(a+b)(x-2y)
=0•(x-2y)
=0.