SOLUTION: Write the expression as a complex number in standard form. 2i(4+i) The answer I got was 8+6i.

Algebra ->  Complex Numbers Imaginary Numbers Solvers and Lesson -> SOLUTION: Write the expression as a complex number in standard form. 2i(4+i) The answer I got was 8+6i.      Log On


   

Question 171088: Write the expression as a complex number in standard form.
2i(4+i)
The answer I got was 8+6i.
Answer by Earlsdon(6294) About Me  (Show Source):
You can put this solution on YOUR website!
Write, as a complex number, in standard form (a+bi):
2i%284%2Bi%29 Apply the distributive property'
8i%2B2i%5E2 But i%5E2+=+-1, so...
8i%2B2%28-1%29 Write in standard form.
-2%2B8i or -2%281-4i%29