SOLUTION: Write expression in the form a = bi, where a and b are real numbers. -3i(4i - 1)

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Question 138839: Write expression in the form a = bi, where a and b are real numbers.
-3i(4i - 1)
Answer by ankor@dixie-net.com(22740) About Me  (Show Source):
You can put this solution on YOUR website!
-3i(4i - 1)
:
Multiply what's inside the brackets by -3i:
-12i^2 + 3i
:
i^2 = -1
-12(-1) + 3i
:
+12 + 3i
or
3(4+i)