已知x2-5x=14求(x-1)(2x-1)-(x+1)2+1的值要详细的过程、
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/30 00:39:28
![已知x2-5x=14求(x-1)(2x-1)-(x+1)2+1的值要详细的过程、](/uploads/image/z/759960-0-0.jpg?t=%E5%B7%B2%E7%9F%A5x2-5x%3D14%E6%B1%82%28x-1%29%282x-1%29-%28x%2B1%292%2B1%E7%9A%84%E5%80%BC%E8%A6%81%E8%AF%A6%E7%BB%86%E7%9A%84%E8%BF%87%E7%A8%8B%E3%80%81)
已知x2-5x=14求(x-1)(2x-1)-(x+1)2+1的值要详细的过程、
已知x2-5x=14求(x-1)(2x-1)-(x+1)2+1的值
要详细的过程、
已知x2-5x=14求(x-1)(2x-1)-(x+1)2+1的值要详细的过程、
(x-1)(2x-1)-(x+1)2+1
=2x²-3x+1-x²-2x-1+1
=x²-5x+1
=14+1
=15
(x-1)(2x-1)-(x+1)2+1
=2x²-3x+1-x²-2x-1+1
=x²-5x+1
=14+1
=15
(x-1)(2x-1)-(x+1)2+1
=2x²-3x+1-x²-2x-1+1
=x²-5x+1
=14+1
=15
能帮到你吗
15