在线求助高一数学衔接题,要详细步骤的~~~~拜托啦!都没学过啊%>_
来源:学生作业帮 编辑:百度作业网作业帮 分类:数学作业 时间:2024/07/03 12:01:17
在线求助高一数学衔接题,要详细步骤的~~~~拜托啦!都没学过啊%>_
![在线求助高一数学衔接题,要详细步骤的~~~~拜托啦!都没学过啊%>_](/uploads/image/z/6720905-65-5.jpg?t=%E5%9C%A8%E7%BA%BF%E6%B1%82%E5%8A%A9%E9%AB%98%E4%B8%80%E6%95%B0%E5%AD%A6%E8%A1%94%E6%8E%A5%E9%A2%98%2C%E8%A6%81%E8%AF%A6%E7%BB%86%E6%AD%A5%E9%AA%A4%E7%9A%84%7E%7E%7E%7E%E6%8B%9C%E6%89%98%E5%95%A6%21%E9%83%BD%E6%B2%A1%E5%AD%A6%E8%BF%87%E5%95%8A%25%3E_)
1,原式=(X立+3X)+(3X方+9)=(X方+3)(X+3)
3,原式=[2(X+Y)]方-(X方-Y方)方=(2X+2Y+X方-Y方)(2X+2Y-X方+Y方)
=(X+Y)(2+X-Y)(X+Y)(2-X+Y)
=(X+Y)方(2+X-Y)(2-X+Y)
5,原式=(6AX-15AY方)-(6B方X-15B方Y方)=3A(2X-5Y方)-3B方(2X-5Y方)
=3(2X-5Y方)(A-B方)
7,原式=(A-B)(A方+AB+B方)-(A-B)=(A-B)(A方+AB+B方-1)
9,原式=X立-(2Y)方-(X方+2XY+4Y方)
=(X-2Y)(X方+2XY+4Y方)-(X方+2XY+4Y方)
=(X方+2XY+4Y方)(X-2Y-1)
3,原式=[2(X+Y)]方-(X方-Y方)方=(2X+2Y+X方-Y方)(2X+2Y-X方+Y方)
=(X+Y)(2+X-Y)(X+Y)(2-X+Y)
=(X+Y)方(2+X-Y)(2-X+Y)
5,原式=(6AX-15AY方)-(6B方X-15B方Y方)=3A(2X-5Y方)-3B方(2X-5Y方)
=3(2X-5Y方)(A-B方)
7,原式=(A-B)(A方+AB+B方)-(A-B)=(A-B)(A方+AB+B方-1)
9,原式=X立-(2Y)方-(X方+2XY+4Y方)
=(X-2Y)(X方+2XY+4Y方)-(X方+2XY+4Y方)
=(X方+2XY+4Y方)(X-2Y-1)