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-2n-(3n-1) a-(5a-3b)+(2b-a) -3(2s-5)+6s 1-(2a-1)-(3a+3) 3(-ab+2a)-(3a-b) 14(abc-2a)+3(6a-2abc) 3(xy-2z)+(-xy+3z) -4(pq+pr)+(4pq+pr)
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人气:192 ℃ 时间:2019-08-17 00:41:06
解答
(1)-2n-(3n-1)=-5n+1(2)a-(5a-3b)+(2b-a)=-5a+5b(3)-3(2s-5)+6s=15 (4)1-(2a-1)-(3a+3)=-5a-1(5)3(-ab+2a)-(3a-b)=3a-3ab+b (6)14(abc-2a)+3(6a-2abc) =14abc-28a+18a-6abc=8abc-10a(7)3(xy-2z)+(-xy+3z) =3xy-6z-xy...
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