tim a,b,c de :\(\left(x^3+ax^2+bx+c\right):\left(x+2\right)\left(x+1\right)\left(x-1\right)deu\) \(du\) \(8\)

tim a;b de:\(\left(x^4+2x^3-3x^2+ax+b\right):\left(x^2-x+2\right)\) thi du \(-4x-1\)

phan tich thanh nhan tu:

\(a\left(b-c\right)^3+b\left(c-a\right)^3+c\left(a-b\right)^3\)

phan tich thanh nhan tu:

\(\left(a+b+c\right)\left(ab+bc+ca\right)-abc\)