基礎math-u02-d02
For the quadratic equation ax^2 + bx + c = 0, the discriminant Delta = 0 means:
A. There is one repeated real root✓ 答案
B. There are two distinct real roots
C. There are no real roots
D. There is one positive and one negative root
解說
Delta > 0 gives two distinct real roots, Delta = 0 gives one repeated real root, and Delta < 0 gives no real roots.