Question

a)     Làm tính chia : ( x³ + 4x² – x – 4 ) : ( x + 1 )

Answer 1

\(=\left(x^2-1\right)\left(x+4\right):\left(x+1\right)\\ =\left(x-1\right)\left(x+1\right)\left(x+4\right):\left(x+1\right)\\ =\left(x-1\right)\left(x+4\right)\)

Answer 2

\(=\dfrac{x^3+x^2+3x^2+3x-4x-4}{x+1}=x^2+3x-4\)

Answer 3

\(\dfrac{x^3+4x^2-x-4}{x+1}\)=x²+3x-4