已知等于
设复数z满足i(z+1)=-3+2i,则z的实部为________.
复数z与(z+2)2-8i均为纯虚数,则z=________.
如果复数z= (b∈R)的实部和虚部互为相反数,则b=________.
复数z=(x2-1)+(x-1)i为纯虚数,则x=________.
方程x2+4=0的根为________.