若分式x²-x-6/x+2的值为0,则x为多少
问题描述:
若分式x²-x-6/x+2的值为0,则x为多少
答
解
(x²-x-6)/(x+2)
=(x-3)(x+2)/(x+2)
=x-3
=0
∴x=3