college algebra
posted by julez .
list potential rational zeros
f(x)=x^4+3x^24

let z = x^2
then
z^2 + 3 z  4 = 0
(z4)(z+1) = 0
z = 4 or z = 1
so
x^2 = 4 or x^2 = 1
so
+/ 2 and +/ 1
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