GraycelynH122794 GraycelynH122794

30-10-2022
Mathematics

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Hi, I need help with home to study for test. Thank you

Hi I need help with home to study for test Thank you class=

Respuesta :

ArvellP255858 ArvellP255858

30-10-2022

Answer

Sum = 22 + 5i

Difference = -14 - 19i

Explanation

Add: (4 - 7i) + (18 + 12i)

Remove the brackets

4 - 7i + 18 + 12i

Grouping the terms, we have

4 + 18 - 7i + 12i

22 + 5i

∴ Sum = 22 + 5i

Subtract: (4 - 7i) - (18 + 12i)

Remove the brackets

4 - 7i - 18 - 12i

Grouping the terms

4 - 18 - 7i - 12i

-14 - 19i

∴ Difference = -14 - 19i

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