A centenarian is a person who has attained the age of 100 years or more.
Much rarer, a supercentenarian is a person who has lived to the age of 110 or more.
Many notable and famous individuals have become centenarians. They include the following:
... that the parabola described by the quadratic equation touches the x-axis in a single point.)
If the discriminant is positive, then there are two different solutions x, ...