我有几道整式的加减计算题!1 (x的平方+5+4x)+(5x-4+2x的平方)2 7x-(5x-5y)-y3 2x-(3x-2y+2)+(3x-4y-1)4 2x+2y-[3x-2(x-y)]还有半个小时!好的我加!块块!
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/05 19:11:51
![我有几道整式的加减计算题!1 (x的平方+5+4x)+(5x-4+2x的平方)2 7x-(5x-5y)-y3 2x-(3x-2y+2)+(3x-4y-1)4 2x+2y-[3x-2(x-y)]还有半个小时!好的我加!块块!](/uploads/image/z/345418-34-8.jpg?t=%E6%88%91%E6%9C%89%E5%87%A0%E9%81%93%E6%95%B4%E5%BC%8F%E7%9A%84%E5%8A%A0%E5%87%8F%E8%AE%A1%E7%AE%97%E9%A2%98%211+%28x%E7%9A%84%E5%B9%B3%E6%96%B9%2B5%2B4x%29%2B%285x-4%2B2x%E7%9A%84%E5%B9%B3%E6%96%B9%292+7x-%285x-5y%29-y3+2x-%283x-2y%2B2%29%2B%283x-4y-1%294+2x%2B2y-%5B3x-2%28x-y%29%5D%E8%BF%98%E6%9C%89%E5%8D%8A%E4%B8%AA%E5%B0%8F%E6%97%B6%21%E5%A5%BD%E7%9A%84%E6%88%91%E5%8A%A0%21%E5%9D%97%E5%9D%97%21)
我有几道整式的加减计算题!1 (x的平方+5+4x)+(5x-4+2x的平方)2 7x-(5x-5y)-y3 2x-(3x-2y+2)+(3x-4y-1)4 2x+2y-[3x-2(x-y)]还有半个小时!好的我加!块块!
我有几道整式的加减计算题!
1 (x的平方+5+4x)+(5x-4+2x的平方)
2 7x-(5x-5y)-y
3 2x-(3x-2y+2)+(3x-4y-1)
4 2x+2y-[3x-2(x-y)]
还有半个小时!好的我加!块块!
我有几道整式的加减计算题!1 (x的平方+5+4x)+(5x-4+2x的平方)2 7x-(5x-5y)-y3 2x-(3x-2y+2)+(3x-4y-1)4 2x+2y-[3x-2(x-y)]还有半个小时!好的我加!块块!
1 (x²+5+4x)+(5x-4+2x²)
=x²+5+4x+5x-4+2x²
=(x²+2x²)+(4x+5x)+(5-4)
=3x²+9x+1
2 7x-(5x-5y)-y
=7x-5x+5y-y
=2x+4y
3 2x-(3x-2y+2)+(3x-4y-1)
=2x-3x+2y-2+3x-4y-1
=(2x-3x+3x)+(2y-4y)+(-2-1)
=2x-2y-3
4 2x+2y-[3x-2(x-y)]
=2x+2y-(3x-2x+2y)
=2x+2y-(x+2y)
=2x+2y-x-2y
=x
1. (x^2+5+4x)+(5x-4+2x^2)=3x^2+9x+1
2. 7x-(5x-5y)-y=7x-5x+5y-y=2x+4y
3. 2x-(3x-2y+2)+(3x-4y-1)
=2x-3x+2y-2+3x-4y-1=2x-2y-3
4. 2x+2y-[3x-2(x-y)]
=2x+2y-(3x-2x+2y)
=2x+2y-3x+2x-2y=x