(2a-1)(3a-2)=12,我化简得a^2-7/6a-10/6a=0,但是用十字相乘算不出来,而且和韦达定理不一样.用韦达定理算的话是x1+x2=7/6,但用十字相乘就是x1+x2=-7/6.怎么会这样?求说明
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/17 23:46:16
![(2a-1)(3a-2)=12,我化简得a^2-7/6a-10/6a=0,但是用十字相乘算不出来,而且和韦达定理不一样.用韦达定理算的话是x1+x2=7/6,但用十字相乘就是x1+x2=-7/6.怎么会这样?求说明](/uploads/image/z/10147938-42-8.jpg?t=%282a-1%29%283a-2%29%3D12%2C%E6%88%91%E5%8C%96%E7%AE%80%E5%BE%97a%5E2-7%2F6a-10%2F6a%3D0%2C%E4%BD%86%E6%98%AF%E7%94%A8%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E7%AE%97%E4%B8%8D%E5%87%BA%E6%9D%A5%2C%E8%80%8C%E4%B8%94%E5%92%8C%E9%9F%A6%E8%BE%BE%E5%AE%9A%E7%90%86%E4%B8%8D%E4%B8%80%E6%A0%B7.%E7%94%A8%E9%9F%A6%E8%BE%BE%E5%AE%9A%E7%90%86%E7%AE%97%E7%9A%84%E8%AF%9D%E6%98%AFx1%2Bx2%3D7%2F6%2C%E4%BD%86%E7%94%A8%E5%8D%81%E5%AD%97%E7%9B%B8%E4%B9%98%E5%B0%B1%E6%98%AFx1%2Bx2%3D-7%2F6.%E6%80%8E%E4%B9%88%E4%BC%9A%E8%BF%99%E6%A0%B7%3F%E6%B1%82%E8%AF%B4%E6%98%8E)
xRN@a?~@,.$V"#$PuxExh
۲a3=uQ7ldn.8m]t2Db
@S1CnS\r'PO-흘ɦљfi*HnG_}Zh[Ud:_J}=nc]dk
{O_o)ʍz}+/\ \͝)_NE7
FBc#̕RNa*[7C)