SubArea: Quadratic equations and inequalitiesLevel: BProject ID: 9000039004Source Problem: 2010007905Accepted: 1Clonable: 1Easy: 0Find all x such that the expression (x−1)(x−7) is negative.x∈(1;7)x∈(−∞;1)∪(7;+∞)No such x exists.x∈R
