SOLUTION: (3i)(2-5i) = 6i-15i^2 = sqrt-6 - (-1)sqrt15 = sqrt-6 + sqrt15 << This was my answer, however my book has a more sensible answer which is: 15+6i. Can I get help on what

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: (3i)(2-5i) = 6i-15i^2 = sqrt-6 - (-1)sqrt15 = sqrt-6 + sqrt15 << This was my answer, however my book has a more sensible answer which is: 15+6i. Can I get help on what       Log On


   

Question 802887: (3i)(2-5i)
= 6i-15i^2
= sqrt-6 - (-1)sqrt15
= sqrt-6 + sqrt15 << This was my answer, however my book has a more sensible answer which is: 15+6i.
Can I get help on what I am doing wrong please?
Thank you for your time.
Answer by Alan3354(69443) About Me  (Show Source):
You can put this solution on YOUR website!
(3i)(2-5i)
= 6i-15i^2
==================
= 6i - 15*(-1)
= 6i + 15
= 15 + 6i
-------------------------
"sensible" is not an issue.
--------------------------------------
= sqrt-6 - (-1)sqrt15
= sqrt-6 + sqrt15 << This was my answer, however my book has a more sensible answer which is: 15+6i.