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Sidana [21]
3 years ago
13

Express (4+7i)(2-i) in the form a+ib​

Mathematics
1 answer:
melomori [17]3 years ago
3 0

(4+7i)(2-i)

multiply it out

8-4i +14i -7i squared

i squared is the same as -1

8-4i+14i-7(-1)

8+7-4i+14i

15+10i

divide by common factor which is 5 in this case

3+2i

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