maelonramirez
04.05.2020 •
Mathematics
When you multiply (3+6i)(3+7i) you get an answer of the form a+bi. Find a.
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Ответ:
(3 + 6i)(3 + 7i)
FOIL: First, Outside, Inside, and Last
3 x 3 = 9
3 x 7i = 21i
6i x 3 = 18i
6i x 71= 42i
9 + 21I + 18I + 42I = 9 + 81I
a = 9
B = 81I
Ответ: