Answer: 7 and -2.
- A 7 and -2
- B -7 and 2
- C 7 and 2
- D -7 and -2
Correct answer: A. 7 and -2
Explanation: x² - 5x - 14 = 0, (x-7)(x+2) = 0, x = 7 or x = -2.
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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