如果ab是相反数,则a(1-y)-b(2y-1)的值是

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如果ab是相反数,则a(1-y)-b(2y-1)的值是
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如果ab是相反数,则a(1-y)-b(2y-1)的值是
如果ab是相反数,则a(1-y)-b(2y-1)的值是

如果ab是相反数,则a(1-y)-b(2y-1)的值是
如果ab是相反数,
a+b=0
则a(1-y)-b(2y-1)=a-ay-2by+b=a+b-(a+2b)y=-by

a(1-y)-b(2y-1)
=a(1-y)+a(2y-1)
=a-ay+2ay-a
=ay