z = -14 + 21i / -2 - 4i
Rectangular form:
z = -14-14.5i
Exponential form:
z = 20.155644 × ei (-133°59'42″)
Polar form:
z = 20.155644 × (cos (-133°59'42″) + i sin (-133°59'42″))
Polar form - absolute value (modulus) and angle (argument):
r = |z| = 20.15564
φ = arg z = -133.99491° = -133°59'42″ = -0.74442π
Calculation steps
Divide: 21i / (-2) = -10.5i
Add: -14 + (-10.5i) = -14-10.5i
Subtract: (-14-10.5i) - 4i = -14 + (-10.5-4)i = -14-14.5i
