Mathematics
If 3 is a root of the quadratic equation x2 - px + 3 = 0, then p is equal to:
4
3
5
2
Quadratic Equations
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Answer
Given,
3 is a root of the quadratic equation x2 - px + 3 = 0.
Substituting value of x = 3 in equation, we get :
⇒ (3)2 - p(3) + 3 = 0
⇒ 9 - 3p + 3 = 0
⇒ 12 - 3p = 0
⇒ 12 = 3p
⇒ p =
⇒ p = 4.
Hence, option 1 is the correct option.
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