Answer: 2 and 3.
- A 2 and 3
- B 1 and 6
- C 2 and -3
- D -2 and -3
Correct answer: A. 2 and 3
Explanation: Factorize: (x-2)(x-3) = 0, so x = 2 or x = 3.
A complex number z = a+ib is plotted as a point (or vector from the origin) on the Argand plane, with the real part along the horizontal axis and the imaginary part along the vertical; its modulus |z| is the vector's length, and its argument θ is the angle from the positive real axis.
Concept context
Complex numbers in a+ib form, modulus, argument, polar form, cube roots of unity, and quadratic equations with complex roots
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