化简7-3x-4x²+4x-8x²+5化简:2(2a-9b)-3(-4a²+b) 8x²-[-3x-(2x²-7x-5)+3]___+(x²y-3xy²)=2x²y-xy² (3a²b+4分之1a²b)7(p³+p²-p-1)-2(p³+p) 6分之1x-(-3分之1x)-1+(-2分之1x)+(-
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/28 03:53:52
![化简7-3x-4x²+4x-8x²+5化简:2(2a-9b)-3(-4a²+b) 8x²-[-3x-(2x²-7x-5)+3]___+(x²y-3xy²)=2x²y-xy² (3a²b+4分之1a²b)7(p³+p²-p-1)-2(p³+p) 6分之1x-(-3分之1x)-1+(-2分之1x)+(-](/uploads/image/z/1855590-6-0.jpg?t=%E5%8C%96%E7%AE%807-3x-4x%26%23178%3B%2B4x-8x%26%23178%3B%2B5%E5%8C%96%E7%AE%80%EF%BC%9A2%EF%BC%882a-9b%EF%BC%89-3%28-4a%26%23178%3B%2Bb%29+8x%26%23178%3B-%5B-3x-%282x%26%23178%3B-7x-5%29%2B3%5D___%2B%28x%26%23178%3By-3xy%26%23178%3B%29%3D2x%26%23178%3By-xy%26%23178%3B+%283a%26%23178%3Bb%2B4%E5%88%86%E4%B9%8B1a%26%23178%3Bb%297%28p%26%23179%3B%2Bp%26%23178%3B-p-1%29-2%28p%26%23179%3B%2Bp%29+6%E5%88%86%E4%B9%8B1x-%28-3%E5%88%86%E4%B9%8B1x%29-1%2B%28-2%E5%88%86%E4%B9%8B1x%29%2B%28-)
化简7-3x-4x²+4x-8x²+5化简:2(2a-9b)-3(-4a²+b) 8x²-[-3x-(2x²-7x-5)+3]___+(x²y-3xy²)=2x²y-xy² (3a²b+4分之1a²b)7(p³+p²-p-1)-2(p³+p) 6分之1x-(-3分之1x)-1+(-2分之1x)+(-
化简7-3x-4x²+4x-8x²+5
化简:2(2a-9b)-3(-4a²+b) 8x²-[-3x-(2x²-7x-5)+3]
___+(x²y-3xy²)=2x²y-xy² (3a²b+4分之1a²b)
7(p³+p²-p-1)-2(p³+p) 6分之1x-(-3分之1x)-1+(-2分之1x)+(-1)
3(x²-y²)+y²-z²)-4(z²-y²)
都化简的!加上标题的那一个一共8个!我明天早上要!慢慢答!
化简7-3x-4x²+4x-8x²+5化简:2(2a-9b)-3(-4a²+b) 8x²-[-3x-(2x²-7x-5)+3]___+(x²y-3xy²)=2x²y-xy² (3a²b+4分之1a²b)7(p³+p²-p-1)-2(p³+p) 6分之1x-(-3分之1x)-1+(-2分之1x)+(-
1、7-3x-4x²+4x-8x²+5
原式=-12x²+x+13=-(12x²-x-13)=-(12x-13)(x+1)
2、2(2a-9b)-3(-4a²+b)
原式=4a-18b+12a²-3b=12a²+4a-21b=4a(3a+1)-21b
3、8x²-[-3x-(2x²-7x-5)+3]
原式=8x²+3x+(2x²-7x-5)-3=8x²+3x+2x²-7x-5-3=10x²-4x-8
4、___+(x²y-3xy²)=2x²y-xy²
___=2x²y-xy²-x²y+3xy²=x²y+2xy²=xy(x+2y)
5、(3a²b+4分之1a²b)
原式=3a²b+(a²b)/4=12(a²b)/4+(a²b)/4=13(a²b)/4
6、7(p³+p²-p-1)-2(p³+p)
原式=7p³+7p²-7p-7-2p³-2p=5p³+7p²-9p-7
7、6分之1x-(-3分之1x)-1+(-2分之1x)+(-1)
原式=[x+(x/3)]/6-1-(x/2)-1=(4x/3)/6-(x/2)-2=(4x/18)-(9x/18)-2=-(5x/18)-2
8、3(x²-y²)+(y²-z²)-4(z²-y²)
原式=3x²-3y²+y²-z²-4z²+4y²=3x²-+2y²-5z²
不知道是不是你想要的
7-3x-4x²+4x-8x²+5
=-12x²+X+12