Question

Perform the indicated operation and write the result in standard form: (-3+2i)(-3-7i)

A. -5+27i
B. 23+15i
C. -5+15i
D. 23-15i
E-5-27I

Answer 1

23+15i

Explanation:

(-3+2i) (-3-7i)

multiply -3 w (-3+2i) and multiply -7i w (-3+2i)

9-6i+21i-14i^2

combine like terms

9+15i-14i^2

i squared is equal to -1 so

9+15i-(14x-1)

9+14+15i

23+15i

hope this helps :)