(1/3)x^4 – 2x^3
x=-3
(1/3)x^4 - 2x^3
If x = -3,
(1/3)(-3)^4 - 2(-3)^3
= 27 + 54
= 81
If x = 3,
(1/3)3^4 - 2(3^3)
= 27 - 54
= -27
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Verified answer
(1/3)x^4 - 2x^3
If x = -3,
(1/3)(-3)^4 - 2(-3)^3
= 27 + 54
= 81
If x = 3,
(1/3)3^4 - 2(3^3)
= 27 - 54
= -27