Given that kx^3+2x^2+2x+3 and kx^3-2x+9 have a common factor,what are the possible valucs of

Given that kx^3+2x^2+2x+3 and kx^3-2x+9 have a common factor,what are the possible valucs of
Given that kx^3+2x^2+2x+3 and kx^3-2x+9 have a common factor,what are the possible valucs of

Given that kx^3+2x^2+2x+3 and kx^3-2x+9 have a common factor,what are the possible valucs of
这意思好像是这两式相等……
用配方法……
k＝1或-3
我用手机不方便,回答不详尽请见谅,