-2t^2+7t-5>0求t的取值范围?
问题描述:
-2t^2+7t-5>0求t的取值范围?
答
-2t^2+7t-5>0
2t^2-7t+5
-2t^2+7t-5>0求t的取值范围?
-2t^2+7t-5>0
2t^2-7t+5