问题 填空题 当x______时,等式2x2-xx(x2+5)=2x-1x2+5成立. 答案 ∵2x2-xx(x2+5)=x(2x-1)x(x2+5),而等式2x2-xx(x2+5)=2x-1x2+5成立,∴x≠0.故答案为≠0.