SOLUTION: What's the result of this? 2i * 7+6i=? Is it: 14i+6? Why? Shouldn't it be: 7+12i^2 ? Thanks

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: What's the result of this? 2i * 7+6i=? Is it: 14i+6? Why? Shouldn't it be: 7+12i^2 ? Thanks      Log On


   

Question 852978: What's the result of this? 2i * 7+6i=?
Is it: 14i+6? Why? Shouldn't it be: 7+12i^2 ?
Thanks
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
What's the result of this? 2i * 7+6i=?
Is it: 14i+6? Why? Shouldn't it be: 7+12i^2 ?
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2i * 7+6i = 2i*7 + 2i*61
= 14i + 12i^2
= 14i - 12
= -12 + 14i