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A teacher asks three students to complet...

A teacher asks three students to complete the following statement about the nature of the roots of a quadratic equation.
If `q^2 – 4pr > 0`, the roots of the quadratic equation `px^2 + qx + r = 0` will be............
Zain answers, "always positive".
Vipul answers, "positive, if p, q, and r are positive".
Suman answers, "negative, if p, q, and r are positive".
Who answered correctly?

A

Zain

B

Vipul

C

Suman

D

None of them

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