判はん別べつ式しき

noun

discriminant

In algebra, the expression b²−4ac used to determine the nature of the roots of a quadratic equation.

• 二に次じ方ほう程てい式しきの判はん別べつ式しきが正せいならば、二ふたつの実じっ数すう解かいを持もつ。

  If the discriminant of a quadratic equation is positive, it has two real solutions.