Question

Considere os polinómios
A(x)=X²+2x+3
B(x)=X³-3x+1
C(x) =3x+2
determine
a) (A+B)×C​

Answer 1

(A+B) = $(x^{2}+2x+3) + (x^{3}-3x+1) = x^{3}+x^{2}-x+4$

(A+B) * C = $\left(x^3+x^2-x+4\right)*\left(3x+2\right)=3x^4+5x^3-x^2+10x+8$

Resposta: $3x^4+5x^3-x^2+10x+8$