SOLUTION: Find all real solutions of the equation. {{{4x^3-25x =0}}}

Algebra ->  Equations -> SOLUTION: Find all real solutions of the equation. {{{4x^3-25x =0}}}      Log On


   

Question 784147: Find all real solutions of the equation.
4x%5E3-25x+=0
Answer by fcabanski(1391) About Me  (Show Source):
You can put this solution on YOUR website!
4x%5E3-25x+=0+=+x%284x%5E2+-25%29 That gives one solution: x=0


4x%5E2+-25+=+0


4x%5E2+=+25


x%5E2+=+25%2F4


x=sqrt%2825%2F4%29 so x= %2B5%2F2 and -5%2F2


0, 5/2 and -5/2 are the real solutions/roots.