作业帮3x²-[7x-(4x-3)-2x²]快给答案着急
来源：学生作业帮助网 编辑：作业帮 时间：2024/12/01 09:55:21
![3x²-[7x-(4x-3)-2x²]快给答案着急](/uploads/image/z/1347223-31-3.jpg?t=3x%26%23178%3B-%5B7x-%284x-3%29-2x%26%23178%3B%5D%E5%BF%AB%E7%BB%99%E7%AD%94%E6%A1%88%E7%9D%80%E6%80%A5)
x)3PS64֍6055>ݿNy܆g
KmQΆ
3x²-[7x-(4x-3)-2x²]快给答案着急
3x²-[7x-(4x-3)-2x²]
快给答案着急
3x²-[7x-(4x-3)-2x²]快给答案着急
=3x²-7x+（4x-3）+2x²
=3x²-7x+4x-3+2x²
=5x²-3x-3
=3x²-[7x-4x+3-2x²]
=3x²-3x-3+2x²
=5x²-3x-3