(1)(2x-3)-2(7-x)(2)5(a2b-3ab2)-2(a2b-7ab2)(3)3a-[a-2(a-b)]+b(4)3x2-[7x-(4x+2)+
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解决时间 2021-02-10 20:05
- 提问者网友:我是女神我骄傲
- 2021-02-09 23:33
(1)(2x-3)-2(7-x)(2)5(a2b-3ab2)-2(a2b-7ab2)(3)3a-[a-2(a-b)]+b(4)3x2-[7x-(4x+2)+
最佳答案
- 五星知识达人网友:舊物识亽
- 2021-02-09 23:59
(1)原式=2x-3-14+2x
=4x-17;
(2)原式=5a2b-15ab2-2a2b+14ab2
=3a2b-ab2;
(3)原式=3a-a+2a-2b+b
=4a-b;
(4)原式=3x2-7x+4x+2-2x2-x2
=2-3x;
(5)原式=4a2-2ab+6a2+3ab
=10a2+ab;
(6)原式=4-4x-3x+3+5x
=7-2x.
=4x-17;
(2)原式=5a2b-15ab2-2a2b+14ab2
=3a2b-ab2;
(3)原式=3a-a+2a-2b+b
=4a-b;
(4)原式=3x2-7x+4x+2-2x2-x2
=2-3x;
(5)原式=4a2-2ab+6a2+3ab
=10a2+ab;
(6)原式=4-4x-3x+3+5x
=7-2x.
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