【a-b】的2次方×【a-b】的4次方-【b-a】的3次方×【a-b】的3次方
人气:159 ℃ 时间:2020-02-05 17:41:06
解答
( a - b)^2 ×(a - b)^4 - ( b - a)^3 ×(a - b)^3= ( a - b)^2 ×(a -b)^4 - [-(a -b)]^3×(a - b)^3= (a - b)^2 ×(a - b)^4 + ( a - b)^3 ×(a - b)^3= (a - b)^6+ ( a - b)^6= 2(a - b)^6
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