Answer:

2x³-x²+2×-8

Step-by-step explanation:

2x⁴+4x³-x³-2x²+2x²+2x²+4x-8x-16

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x+2

2x³ ×(x + 2)-x² ×(x+2)+ 2x ×(x+2)-8(x+2)

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x+2

(x+2)×(2x³-x²+2x-8)

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x+2