SOLUTION: Okay, I think i did this right, but i'm not sure. the question is; 4i(-7+i) i got 24. is that right?

Algebra ->  Quadratic Equations and Parabolas  -> Quadratic Equations Lessons  -> Quadratic Equation Lesson -> SOLUTION: Okay, I think i did this right, but i'm not sure. the question is; 4i(-7+i) i got 24. is that right?      Log On


   

Question 181594: Okay, I think i did this right, but i'm not sure.
the question is;
4i(-7+i)
i got 24.
is that right?
Found 2 solutions by vleith, solver91311:
Answer by vleith(2983) About Me  (Show Source):
You can put this solution on YOUR website!
Not quite
4i%28-7%2Bi%29
-28i+%2B+4i%5E2
-28i+-+4
-4+-+28i
You cannot 'add' real and imaginary, so you end up with two 'parts' to the result

Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


Missed it by that much.



You lost a pesky little i in your process, not to mention a bit of confusion over signs -- or perhaps you inserted an i where there wasn't one. But a valiant try, nonetheless. Keep it up.

John