SOLUTION: Simplify all square roots and answers should not be decimals Factor or solve the following 2x⁴-7x²-4

Algebra ->  Exponential-and-logarithmic-functions -> SOLUTION: Simplify all square roots and answers should not be decimals Factor or solve the following 2x⁴-7x²-4      Log On


   

Question 1174734: Simplify all square roots and answers should not be decimals
Factor or solve the following
2x⁴-7x²-4
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!

Hi
2x⁴-7x²-4           |Let X = x^2
2X^2 - 7X - 4 = 0
(2X + 1)(X -  4)
             0r
  X = -1/2          X = 4
  x^2 = -.5        x^2 = 4
  x = ± i√.5         x = ± 2

Wish You the Best in your Studies.