LAC 28:CXLII.3501. The complex number System

A. Perform arithmetic operations with complex numbers. 1. Use the relation i2 = –1 and the commutative, associative, and distributive properties to add, subtract, and multiply complex numbers. 2. Find the conjugate of a complex number; use conjugates to find moduli and quotients of complex numbers. B. Represent complex numbers and their operations on the complex plane. 1. Represent complex numbers on the complex plane in rectangular and polar form, including real and imaginary numbers, and explain why the rectangular and polar forms of a given complex number represent the same number. 2. Represent addition, subtraction, multiplication, and conjugation of complex numbers geometrically on the complex plane; use properties of this representation for computation. 3. Calculate the distance between numbers in the complex plane as the modulus of the difference, and the midpoint of a segment as the average of the numbers at its endpoints. C. Use complex numbers in polynomial identities and equations. 1. Solve quadratic equations with real coefficients that have complex solutions. 2. Extend polynomial identities to the complex numbers. 3. Know the Fundamental Theorem of Algebra; show that it is true for quadratic polynomials.