Find all zeros of the function
f
(
x
)
=
4
x
3
−
20
x
2
+
13
x
+
12
\displaystyle {f{{\left({x}\right)}}}={4}{x}^{{3}}-{20}{x}^{{2}}+{13}{x}+{12}
f
(
x
)
=
4
x
3
−
20
x
2
+
13
x
+
12
. Enter the zeros as fractions or integers, separated by commas.
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\displaystyle
Enter your answer as a list of values separated by commas: Example: -4, 3, 2
Enter each value as a reduced fraction (like 5/3, not 10/6) or as an integer (like 4 or -2)
Do not enter mixed numbers
Enter DNE for Does Not Exist, oo for Infinity