a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 08:42:54
![a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]](/uploads/image/z/10321855-7-5.jpg?t=a%26%23178%3B%E2%80%90%5B2%EF%BC%88a%26%23178%3Bb%E2%80%902a%26%23178%3Bc%EF%BC%89%E2%80%90%EF%BC%882b%26%23178%3Bc%E2%80%90a%26%23178%3Bc%EF%BC%89%5D)
a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]
a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]
a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]
-2a*2 b+3a*2 c+2b*2 c+a*2
a²‐[2(a²b‐2a²c)‐(2b²c‐a²c)]=a²‐(2a²b‐4a²c‐2b²c+a²c)=a²‐(2a²b‐3a²c‐2b²c)=a²‐2a²b+3a²c+2b²c