ALGEBRA QUESTION!

Question

Simplify: 3 + 6i - 5i² + 4i³ - 3ii

(A) 8 + 2i - 3ii

(B) 3 + 6i - 8i² + 4i³

(C) 11 + 2i

(D) 1 + 10i

(E) None of the above

For this I got, (C) 11 + 2i, is this correct?

Answer 1

Since i² = -1...

3 + 6i -5(-1) + 4i(-1) - 3(-1) = 11 + 2i

Good job!

Answer 2

Yes--you got the right answer