Question

X-1除以X-3等于M的平方除以2X-6 当X取增根时M等于几啊?

Answer 1

[x-1]/(x-3)=m^2/(2x-6)

2(x-1)=m^2

当X-3=0,即X=3时方程有增根,代入得：

m^2=2(3-1)=4

m=+2或-2