Question

[Lê Linh Chi]

bài 11: cho đa thức F(x)=-x+2+5x²+2x⁴+2x³+x²+x⁴

                               G(x)=-x²+x³+x-6-3x³-4x²-3x⁴
 

^{a.Tính F(x)+G(x);F(x)-G(x)}

Answer 1

[Nguyễn Lê Phước Thịnh]

a: f(x)=3x^4+2x^3+6x^2-x+2

g(x)=-3x^4-2x^3-5x^2+x-6

f(x)+g(x)

=3x^4+2x^3+6x^2-x+2-3x^4-2x^3-5x^2+x-6

=x^2-4

f(x)-g(x)

=3x^4+2x^3+6x^2-x+2+3x^4+2x^3+5x^2-x+6

=6x^4+4x^3+11x^2-2x+8