Two imaginary roots
A.144
B.O
D.-4
C.36

Answer:

D) -4 (with imaginary roots ±2i)

Step-by-step explanation:

Since you cannot take the square root of a negative number to produce a real result, the only option that has two imaginary roots is D) -4, where the two imaginary roots are 2i and -2i.

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Line Speed Number of Defective Parts Found
20 21
20 19
40 15
30 16
60 14
40 17

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