mason5579
10.09.2019 •
Mathematics
How do you solve (3+7i)(2-5i)and put it in standard form?
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Ответ:
41 - i
Step-by-step explanation:
note that i² = - 1
Given
(3 + 7i)(2 - 5i) ← expand the factors using FOIL
= 6 - 15i + 14i - 35i² ← collect like terms
= 6 - i + 35
= 41 - i ← in standard form
Ответ: