SOLUTION: For i =square root −1, if 3i(2 + 5i) = x + 6i,then x = ? A. �15 B. 5 C. 5i D. 15i E. 27i

SOLUTION: For i =square root −1, if 3i(2 + 5i) = x + 6i,then x = ? A. �15 B. 5 C. 5i D. 15i E. 27i

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Question 595213: For i =square root −1, if 3i(2 + 5i) = x + 6i,then x = ?
A. �15
B. 5
C. 5i
D. 15i
E. 27i
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
3i(2 + 5i) = x + 6i

6i + 15i^2 = x + 6i

6i + 15(-1) = x + 6i

6i - 15 = x + 6i

- 15 = x

x = -15

So the answer is choice A
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