Question 365581
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Hi, 
Find the zeros of 
g(x) = (x^4) - (21x^2) -100
(x^2 -25)(x^2 + 4) = 0
(x^2 -25)=0
x^2 = 25
x = 5 or  x = -5
(x^2 + 4) = 0
x^2 = -4
x = -2i or x = 2i