When do I use |z| = √(a²+b²) in Complex Numbers, and what does it mean?
modulus (distance from origin) of z = a+bi.
|z| = √(a²+b²) — modulus (distance from origin) of z = a+bi. Use it when: any complex number. Always check the condition holds before plugging in numbers.
Key point
|z| = √(a²+b²)
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