Without graphing, identify the quadrant in which the point (x, y) lies if x < 0 and y < 0. a. ii b. iv c. i d. iii

a complex number is a number that can be expressed in the form a + bi, where a and b are real numbers, and i is a solution of the equation x2 = −1. because no real number satisfies this equation, i is called an imaginary number. has no real solution, since the square of a real number cannot be negative.

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