1编号:58184题型:填空题测试正确率:35.76%
____.
2编号:31718题型:填空题测试正确率:0%
计算的值为____
3编号:1885题型:填空题测试正确率:87.21%
若,则x2+4x-5=______; 若,则x2+2x-1=______.
4编号:1884题型:填空题测试正确率:82.21%
设m>n>0,m²+n²=4mn,则的值等于___.
提醒: