合并同类项和去括号和化简1.去括号-(2x²-3x-1) 2.化简-(a²-2ab)+【a²-(ab+2)】3.合并同类项5xy²+3x²y-xy²-2x²y-1
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/22 17:11:41
![合并同类项和去括号和化简1.去括号-(2x²-3x-1) 2.化简-(a²-2ab)+【a²-(ab+2)】3.合并同类项5xy²+3x²y-xy²-2x²y-1](/uploads/image/z/979710-6-0.jpg?t=%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B9%E5%92%8C%E5%8E%BB%E6%8B%AC%E5%8F%B7%E5%92%8C%E5%8C%96%E7%AE%801.%E5%8E%BB%E6%8B%AC%E5%8F%B7-%EF%BC%882x%26sup2%3B-3x-1%EF%BC%89+2.%E5%8C%96%E7%AE%80-%EF%BC%88a%26sup2%3B-2ab%EF%BC%89%2B%E3%80%90a%26sup2%3B-%EF%BC%88ab%2B2%EF%BC%89%E3%80%913.%E5%90%88%E5%B9%B6%E5%90%8C%E7%B1%BB%E9%A1%B95xy%26sup2%3B%2B3x%26sup2%3By-xy%26sup2%3B-2x%26sup2%3By-1)
合并同类项和去括号和化简1.去括号-(2x²-3x-1) 2.化简-(a²-2ab)+【a²-(ab+2)】3.合并同类项5xy²+3x²y-xy²-2x²y-1
合并同类项和去括号和化简
1.去括号
-(2x²-3x-1)
2.化简
-(a²-2ab)+【a²-(ab+2)】
3.合并同类项
5xy²+3x²y-xy²-2x²y-1
合并同类项和去括号和化简1.去括号-(2x²-3x-1) 2.化简-(a²-2ab)+【a²-(ab+2)】3.合并同类项5xy²+3x²y-xy²-2x²y-1
1.-2x²+3x+1
2.ab+2
3.(4y+x)xy-1
自己想 让我来说 没门
1.-2x²+3x+1
2.-a²+2ab+(a²-ab-2)
=-a²+2ab+a²-ab-2
=ab-2
3.4xy²+x²y-1
=xy(4y+x)-1