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Which expression is equivalent to (4 + 7i)(3 + 4i)?
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2 votes
Which expression is equivalent to (4 + 7i)(3 + 4i)?

User Pravin Suthar
by
7.6k points

2 Answers

6 votes

Answer:

A

Explanation:

User Obliquely
by
7.6k points
3 votes

we have


(4+7i)(3+4i)

remember that


i^(2) =-1

Applying the distributive property


(4+7i)(3+4i)=4*3+4*4i+7i*3+7i*4i \\=12+16i+21i+28 i^(2)\\= 12+37i+28*(-1) \\=12-28+37i\\=-16+37i

therefore

the answer is


-16+37i

User Marley
by
6.6k points
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