Correct. $\displaystyle-{{x}}^{{2}}-{1}\ge-{2}\usepackage{cmbright}\Huge\$ can be rewritten as $\displaystyle-{{x}}^{{2}}\ge-{1}\usepackage{cmbright}\Huge\$ and also $\displaystyle{{x}}^{{2}}\le{1}\usepackage{cmbright}\Huge\$ , so when x is between -1 and 1 this inequality is true. The inequality is not true for all other values of x.