CSCA MathematicsChapter 3: Geometry & AlgebraBeginner
Complex Numbers: Arithmetic & Modulus
复数的代数表示、四则运算与几何意义 · Node 3.3
Standard form $z = a + bi$, imaginary unit $i^2 = -1$, conjugate $\bar{z} = a - bi$, modulus $|z| = \sqrt{a^2+b^2}$, and complex plane representation.
Chapter Weight: 25% of official examination
Practice This NodeCore Mathematical Axiom
Formula Proof & TrapsCSCA Exam Trap Alert
Applying $i^2 = -1$ inside a real radical or forgetting that $a, b$ must be real numbers.