1编号:19505题型:解答题测试正确率:0%

5a3-2a2+a-2(a3-3a2)-1,其中a=-1.

2编号:19504题型:解答题测试正确率:0%

3编号:19503题型:解答题测试正确率:0%

(9a2-12ab+5b2)-(7a2+12ab+7b2

4编号:19502题型:解答题测试正确率:0%

5编号:19501题型:解答题测试正确率:0%

6编号:19500题型:解答题测试正确率:0%

7编号:19499题型:解答题测试正确率:0%

8编号:19498题型:解答题测试正确率:0%

9编号:19497题型:解答题测试正确率:0%

(9a2-12ab+5b2)-(7a2+12ab+7b2

10编号:19496题型:解答题测试正确率:0%