Trả lời
P(x) = - $6x^2$ + $5x^5$ - 5x - 2 + $4x^3$
= ( $-5x^5$ + $5x^5$ ) + $4x^3$ - $6x^2$ - 5x -2
= $4x^3$ - $6x^2$ - 5x -2
Q(x) = $-2x^4$ - $5x^3$ + 10x - $17x^2$ + $4x^3$ - 5 + x³
= $-2x^4$ + ( - $5x^3$ + $4x^3$ + x³ ) - $17x^2$ + 10x - 5
= $-2x^4$ - $17x^2$ + 10x - 5