Question

simplify the expression:
(8- squareroot of -1) - (-3 + squareroot of -16)

Answer 1

8-i-(-3+4i)= 8-i+3-4i = 11-3i

Answer 2

thank you. can you help me with two more possibly?

Answer 3

Possibly

Answer 4

-5(1+2i)+3i(3-4i)....isnt this -5+-10i + 6i-12i
and then -5-16i
right?

Answer 5

-5-10i+9i-12i^2=-5-10i+9i+12=17-i

Answer 6

okay i see where i messed up. thank you. and one more?

Answer 7

ok

Answer 8

(-2+ squareroot of -9)(6+ squareroot of -25)
sorry I don't understand these.