Question

Efetue e reduza os termos semelhantes quando necessário.

A) (2x + 8) × (5x + 1)

B) (x - y) × (x^2 - xy + y^2)

C) (9x^6 - 12x^5 + 18x^3 - x^2) × (3x^2)

D) (x^2 + x^3 + x^4) ÷ (+x^2)

Answer 1

A) (2x + 8) x (5x +1)=
10x^2 + 2x + 40x +8=
10x^2 + 42x +8

B) (x - y) × (x^2 - xy + y^2)=
x^3 -x^2y +xy^2 -x^2y +xy^2 -y^3
x^3 -2(x^2y) +2(xy^2) -y^3

C) (9x^6 - 12x^5 + 18x^3 - x^2) × (3x^2)=
27x^8 - 36x^7 + 54x^5 - 3x^4 +18x^6 - 24x^5 + 36x^3 - 2x^2=
27x^8 - 36x^7 + 18x^6 + 30x^5 - 3x^4 + 36x^3 - 2x^2

D) (x^2 + x^3 + x^4) / (+x^2)=
(x^2(1 + x +x^2))/x^2=
x^2 +2 +1