-1

问题描述:

-1

数学人气:872 ℃时间:2020-06-23 11:03:11
优质解答
IX-2I-IX+1I+2IX-4I
=2-x-x-1+2(4-x)
=1-2x+8-2x
=9-4x
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IX-2I-IX+1I+2IX-4I
=2-x-x-1+2(4-x)
=1-2x+8-2x
=9-4x