3 years ago

Please can someone help me ?

Mathematics

2 answers:

anygoal [31]3 years ago

5 0

Answer:

-3-5i

Step-by-step explanation:

Eddi Din [679]3 years ago

4 0

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

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