已知(x²+1)²-5(x²+1)-6=0,则x²+1=____, x=_____.速度!谢谢!
来源:学生作业帮助网 编辑:作业帮 时间:2024/08/01 01:40:00
![已知(x²+1)²-5(x²+1)-6=0,则x²+1=____, x=_____.速度!谢谢!](/uploads/image/z/1024554-66-4.jpg?t=%E5%B7%B2%E7%9F%A5%EF%BC%88x%26%23178%3B%2B1%EF%BC%89%26%23178%3B-5%EF%BC%88x%26%23178%3B%2B1%EF%BC%89-6%3D0%2C%E5%88%99x%26%23178%3B%2B1%3D____%2C+x%3D_____.%E9%80%9F%E5%BA%A6%21%E8%B0%A2%E8%B0%A2%21)
x){}KPS646|5E55y1.f:
`:^e)ذmj<@4;lhk<[~,Tc)yĻCPY YgÓ@BRnkcڋVT
mP>.6yv >g
已知(x²+1)²-5(x²+1)-6=0,则x²+1=____, x=_____.速度!谢谢!
已知(x²+1)²-5(x²+1)-6=0,则x²+1=____, x=_____.
速度!谢谢!
已知(x²+1)²-5(x²+1)-6=0,则x²+1=____, x=_____.速度!谢谢!
答案:
则x²+1=5,x=±√5.
(x²+1)²-5(x²+1)-6=0
(x²+1-6)(x²+1+1)=0
所以:x²+1-6=0或者x²+2=0
即:x²+1=6
x²=5,
x=±√5