3 years ago

Simplify the expression (3+i)(2+i)

Mathematics

2 answers:

Ipatiy [6.2K]3 years ago

4 0

Answer:

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

vovikov84 [41]3 years ago

3 0

Answer:

Step-by-step explanation:

hello :

(3+i)(2+i) = 6+3i+2i+i² but : i² = -1

(3+i)(2+i) = 5+5i

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