1编号:29587题型:解答题测试正确率:71.61%
①-9x2+(x-y)2②(m2+2m)2+2(m2+2m)+1
2编号:26585题型:解答题测试正确率:74.17%
(1)计算:(2)分解因式:
3编号:26576题型:解答题测试正确率:82.61%
分解因式:= .
提醒: