Tìm phân thức A , thoả mãn: x-4/x^3-3x^2+x-3:A=x^2-5x+4/(x-2)(x-3)
Giải thích
⇒A=x−4x3−3x2+x−3:x2−5x+4x−2x−3
A=x−4x3−3x2+x−3.x−2x−3x2−5x+4
A=x−4x2x−3+x−3.x−2x−3x2−x−4x+4
A=x−4x−3x2+1.x−2x−3x−1x−4
A=x−2x−1x2+1
⇒A=x−4x3−3x2+x−3:x2−5x+4x−2x−3
A=x−4x3−3x2+x−3.x−2x−3x2−5x+4
A=x−4x2x−3+x−3.x−2x−3x2−x−4x+4
A=x−4x−3x2+1.x−2x−3x−1x−4
A=x−2x−1x2+1