Cho đa thức :
`P(x) x^5 – 3x^2+x^4 – 1/2x-x^5+5x^4+x^2-1`
`Q(x)=x-x^9+x^2 – 5-x^3+x^6-x+3x^9+2x^6-x^3+7`
Tính : `P(x) – Q(x)`
Cho đa thức :
`P(x) x^5 – 3x^2+x^4 – 1/2x-x^5+5x^4+x^2-1`
`Q(x)=x-x^9+x^2 – 5-x^3+x^6-x+3x^9+2x^6-x^3+7`
Tính : `P(x) – Q(x)`
Câu hỏi mới
P(x) = x^5 + x^4 – 3x^2 – x^5 + 5x^4 – 12x
= x^4 + 2x^4 – 3x^2 – 12x
= 3x^4 – 3x^2 – 12x
= 2x^9 + 3x^6 – 2x^3 + x^2 + 2
= -2x^9 – 3x^6 + 3x^4 + 2x^3 – 4x^2 – 12x – 2