6x^3-10x^2+5x+3=(3x+1)(Ax^2+Bx+3)

问题描述:

6x^3-10x^2+5x+3=(3x+1)(Ax^2+Bx+3)
A=?
B=?

A=2
B=-4
6x^3-10x^2+5x+3=(3x+1)(Ax^2+Bx+3)
6x^3-10x^2+5x+3=3Ax^3+(3B+A)x^2+(9+B)x+3
所以:6=3A
-10=3B+A
所以
A=2
B=-4