1.已知代数式x²+px+q,当x=-1时,他的值是-5,当x=-2时,他的值是4,求p:q的值.2.方程组:3x-5y=2a 的解互为相反数,求a的值.2x+7y=a-18 3.解三元一次方程组:x+y+z=26x-y=12x-y+z=18
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/11 13:54:34
![1.已知代数式x²+px+q,当x=-1时,他的值是-5,当x=-2时,他的值是4,求p:q的值.2.方程组:3x-5y=2a 的解互为相反数,求a的值.2x+7y=a-18 3.解三元一次方程组:x+y+z=26x-y=12x-y+z=18](/uploads/image/z/5633253-45-3.jpg?t=1.%E5%B7%B2%E7%9F%A5%E4%BB%A3%E6%95%B0%E5%BC%8Fx%26sup2%3B%2Bpx%2Bq%2C%E5%BD%93x%3D-1%E6%97%B6%2C%E4%BB%96%E7%9A%84%E5%80%BC%E6%98%AF-5%2C%E5%BD%93x%3D-2%E6%97%B6%2C%E4%BB%96%E7%9A%84%E5%80%BC%E6%98%AF4%2C%E6%B1%82p%EF%BC%9Aq%E7%9A%84%E5%80%BC.2.%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9A3x-5y%3D2a+%E7%9A%84%E8%A7%A3%E4%BA%92%E4%B8%BA%E7%9B%B8%E5%8F%8D%E6%95%B0%2C%E6%B1%82a%E7%9A%84%E5%80%BC.2x%2B7y%3Da-18+3.%E8%A7%A3%E4%B8%89%E5%85%83%E4%B8%80%E6%AC%A1%E6%96%B9%E7%A8%8B%E7%BB%84%EF%BC%9Ax%2By%2Bz%3D26x-y%3D12x-y%2Bz%3D18)
xX[SI+Ag[w[A$,5 &O>;sAFe7S̜>s9=%{=cNXh~/1cSqv4TZYkꈻU %9\vZ&Mu$ki݃j4+@:Ѧ%iUW Bm,k G3=2QS'}_7}76eOjvFР_j&6e#+)U$sVk6+MU(PmEI($aSJY+K Yo*3˿YOPVw5
!ldgj,!D )k7C#aweӆ>i2H *JWf{^W0lh125)872e1=rP{jr#zdyLO*qbm8l =̤nI<~)JDբnF}*(O >~)2%KqL|dH$/gis7WT+D11ћJ
2%CbIuצVP0WIQb)˳NuY}Vίً>wjxf5VP"B]C(\fkUl^,2}C+V)/p4l^fW _ac