Answer:x^4-2x^3-17x^2+8x+72
Explanation:
X=3 x=-3 x=4 x=-2
(X-3)(x+3)(x-4)(x+2)
(X^2-9)(x^2-2x-8)
X^4-2x^3-8x^2-9x^2+8x+72
X^4-2x^3-17x^2+8x+72
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