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-2x⁴ -6x³-2x²
= -x³ -9x²-19x
x³+3x²+ x
= -6x²-18x-6
6x²+18x+6
= = =
(2x⁴+5x³-7x²-19x-6):(x²+3x+1)=2x²-x-6