z=m^2-1+(m^2-m-2)i(1)实数(m^2-m-2)=0(m-2)(m+1)=0m=2,m=-1(2)纯虚数m^2-1=0,(m^2-m-2)≠0m=1
你的()后边落了个“i”(1)m = 2或 -1(2)m = 1