SOLUTION: x^4-29x^2+100=0

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: x^4-29x^2+100=0      Log On


   



Question 234838: x^4-29x^2+100=0
Found 2 solutions by JaspersHeart, jim_thompson5910:
Answer by JaspersHeart(2) About Me  (Show Source):
You can put this solution on YOUR website!
First you factor the problem
(x^2 - 25)(x^2 - 4) [Check using FOIL]
Then to find the zeros you do: & Solve
x^2 - 25 = 0
x^2 = 25
x = 5
x^2 - 4 = 0
x^2 = 4
x = 2
Solution:
x = 5 OR 2

Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
The previous solution is on the right track, but forgot about the "plus/minus" when dealing with square roots. So the 4 solutions are -2, 2, -5, and 5.