lily

12-27-2013, 04:39 AM

SAT subject math 2 - Complex numbers

Which of the following is the result of the product (x-i)(x+i)?

(A) x^2

(B) x^2-1

(C) x^2+1

(D) x^2+2i

(E) x^2-2i

Thanks!

Which of the following is the result of the product (x-i)(x+i)?

(A) x^2

(B) x^2-1

(C) x^2+1

(D) x^2+2i

(E) x^2-2i

Thanks!