Bài 4

a)\(x^3+6x^2+11x+6\)

b)\(x^3+6x^2-13x-42\)

c)\(x^3-5x^2+8x-4\)

d)\(2x^3-x^2+3x+6\)

Bài 4.

a) \(x^3-7x-6\)

b)\(x^3-6x^2+8x\)

c)\(x^4+2x^3-16x^2-2x+15\)

d)\(x^3-11x^2+30x\)

Bài 3

a) \(\left(x^2+x\right)^2+4x^2+4x\)

b) \(x\left(x+1\right)\left(x+2\right)\left(x+3\right)+1\)

c) \(\left(x+2\right)\left(x+3\right)\left(x+4\right)\left(x+5\right)-24\)