几道初一水平的数学题,谁能帮我一下!(1)8xy-x^2+y^2-y^2+x^2-8xy(2)2x^2-2分之1+3x-4x-x^2+2分之1已知A=a^2+b^2-c^2, B=-4a^2+2a-b^2+3c^2,并且A+B+C=0,求c如果-0.3m^x与m^4n^y是同类项,求代数式:(-5x^y-4y^3-2xy^2+3x^3
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/27 22:57:36
![几道初一水平的数学题,谁能帮我一下!(1)8xy-x^2+y^2-y^2+x^2-8xy(2)2x^2-2分之1+3x-4x-x^2+2分之1已知A=a^2+b^2-c^2, B=-4a^2+2a-b^2+3c^2,并且A+B+C=0,求c如果-0.3m^x与m^4n^y是同类项,求代数式:(-5x^y-4y^3-2xy^2+3x^3](/uploads/image/z/1031792-32-2.jpg?t=%E5%87%A0%E9%81%93%E5%88%9D%E4%B8%80%E6%B0%B4%E5%B9%B3%E7%9A%84%E6%95%B0%E5%AD%A6%E9%A2%98%2C%E8%B0%81%E8%83%BD%E5%B8%AE%E6%88%91%E4%B8%80%E4%B8%8B%21%EF%BC%881%EF%BC%898xy-x%5E2%2By%5E2-y%5E2%2Bx%5E2-8xy%EF%BC%882%EF%BC%892x%5E2-2%E5%88%86%E4%B9%8B1%2B3x-4x-x%5E2%2B2%E5%88%86%E4%B9%8B1%E5%B7%B2%E7%9F%A5A%3Da%5E2%2Bb%5E2-c%5E2%2C+B%3D-4a%5E2%2B2a-b%5E2%2B3c%5E2%2C%E5%B9%B6%E4%B8%94A%2BB%2BC%3D0%2C%E6%B1%82c%E5%A6%82%E6%9E%9C-0.3m%5Ex%E4%B8%8Em%5E4n%5Ey%E6%98%AF%E5%90%8C%E7%B1%BB%E9%A1%B9%2C%E6%B1%82%E4%BB%A3%E6%95%B0%E5%BC%8F%EF%BC%9A%28-5x%5Ey-4y%5E3-2xy%5E2%2B3x%5E3)
xVN@~W8
ήSh"a)D@CU Ђ(R$ĻT^9
QjBH=`)ofgfw̌ŏwTщlT^G^sg#zW-S]ztS/nncnd[--DR
QMCHh|gYr@[$M0lJd1`JPΜ8@Hsy7FNYܩiv7r&igE|Sp[66mbe[4{14@Y^
D1x5Kuc4LJzjh
]Lí_+p|()1nr R@A12 >6-Dw#ETWėsحwԊ͌eA 39?yΣU/g(ȫ*?%Rlékj'Y$Ts>WBs- Rz6*#C<(-nB#&d