SOLUTION: i cant figure this out.... {{{4/x^4-5/x^2+1=0}}}

Algebra ->  Radicals -> SOLUTION: i cant figure this out.... {{{4/x^4-5/x^2+1=0}}}      Log On


   

Question 143960: i cant figure this out.... 4%2Fx%5E4-5%2Fx%5E2%2B1=0
Answer by nabla(475) About Me  (Show Source):
You can put this solution on YOUR website!
4%2Fx%5E4-5%2Fx%5E2%2B1=0
4%2Fx%5E2-5%2Bx%5E2=0
4-5x%5E2%2Bx%5E4=0
(x^2-1)(x^2-4)=0
Implies x= +/- 1 or x=+/-2
graph%28+300%2C+200%2C+-5%2C+5%2C+-5%2C+5%2C+4%2Fx%5E4-5%2Fx%5E2%2B1%29
Notice the intersections.