Question

If the quadratic equation has two rational roots,then the discriminant is_____and a perfect square

Answer 1

The quadratic has two equal roots like d if it is perfect square and we may write: (x − d) 2 = x 2 − 2 d x + d 2 Then: Δ = 4 d 2 − 4 d 2 = 0 That is the discriminant is zero when the quadratic is perfect square.

Explanation:

Answer 2

Real and unequal