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One root of the equation $x^{2} + p x + 12 = 0$ is 4. The other root is:

Competition practiceAlgebra

A4
B−3
C3
D12

Step-by-Step Solution

The product of the roots is 12, so the other root is 12/4 = 3. (Then

p = - (4 + 3) = - 7

and the equation is

x^{2} - 7 x + 12 = 0.

)

Answer: C) 3

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