Mathematics | Course : Model Mathematics III (Integrated Pathway)
Domain - The Complex Number System
Cluster - Use complex numbers in polynomial identities and equations.
[MIII.N-CN.C.8] - (+) Extend polynomial identities to the complex numbers. For example, rewrite x2 + 4 as (x + 2i)(x – 2i).
- Complex number
A number that can be written as the sum or difference of a real number and an imaginary number. - Polynomial
The sum or difference of terms which have variables raised to positive integer powers and which have coefficients that may be real or complex. The following are all polynomials: 5x3 – 2x2 + x – 13, x2y3 + xy, and (1 + i)a2 + ib2.
[MII.N-CN.A.1] -
Know there is a complex number i such that i2 = −1, and every complex number has the form a + bi with a and b real.
[MII.A-SSE.A.2] -
Use the structure of an expression to identify ways to rewrite it. For example, see (x + 2)2 – 9 as a difference of squares that can be factored as ((x + 2) + 3)((x + 2) – 3).
[PC.N-CN.B.4] -
(+) 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.
[PC.N-CN.C.8] -
(+) Extend polynomial identities to the complex numbers. For example, rewrite x2 + 4 as (x + 2i)(x – 2i).
[PC.N-CN.C.9] -
(+) Know the Fundamental Theorem of Algebra; show that it is true for quadratic polynomials.