Mathematics
28.04.2020 06:35
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Simplify the expression (3+i)(2+i)
Simplify the expression (3+i)(2+i)
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shradhwaip2426
4,6(45 marks)
Step-by-step explanation:
hello :
(3+i)(2+i) = 6+3i+2i+i² but : i² = -1
(3+i)(2+i) = 5+5i
lily0806
4,4(7 marks)
5 +5i
Step-by-step explanation:
(3+i)(2+i)
FOIL
first 3*2 =6
outer: 3i
inner : 21
last i*i = i^2 = -1
Add them together
6+3i+2i-1
5 +5i
hockeykid7583
5,0(20 marks)
Where are all the answer choices? we also need an image
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