题目
9m平方+【4m平方-3m-(2m平方-6m)】
提问时间:2020-08-03
答案
9m²+【4m²-3m-(2m²-6m)】
=9m²+(4m²-3m-2m²+6m)
=9m²+(2m²+3m)
=9m²+2m²+3m
=11m²+3m
=9m²+(4m²-3m-2m²+6m)
=9m²+(2m²+3m)
=9m²+2m²+3m
=11m²+3m
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