SOLUTION: Find all the zeros of the equation -4x^4 - 44x^2 + 3600 = 0

Algebra ->  Polynomials-and-rational-expressions -> SOLUTION: Find all the zeros of the equation -4x^4 - 44x^2 + 3600 = 0      Log On


   

Question 623649: Find all the zeros of the equation -4x^4 - 44x^2 + 3600 = 0
Answer by ewatrrr(24785) About Me  (Show Source):
You can put this solution on YOUR website!
 

Hi,  

Find all the zeros of the equation: 

-4x^4 - 44x^2 + 3600 = 0    | Let X = x^2

-4X^2 - 44X + 3600 = 0

  X^2 + 11X - 900 = 0

x+=+%28-b+%2B-+sqrt%28+b%5E2-4%2Aa%2Ac+%29%29%2F%282%2Aa%29+

X+=+%28-11+%2B-+sqrt%28+3721+%29%29%2F%282%29+

  X = 25 OR X = -36

  x^2 = 25,  x= ±5   Zeros

  x^2 = -36  x = ±6i