Protective clothing is worn to protect either the wearer's body or other items of clothing. Conversely, special clothes may protect the working environment from pollution and/or infection from the worker, for example in a microchip[?] factory. The protection may also be important both ways, as with the use latex gloves[?] by surgeons and dentists[?].
Examples:
apron protects the body and other clothing (also used as distinction by waiters[?])
... (Geometrically, this means that the parabola described by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then th ...