Question

Which of the following is the product of the complex numbers below!

(7+4i)(2-3i)
OA. 26 +29i
OB. 2-13i
O C. 2+29i
OD. 26-13i

Answer 1

D. 26-13i

Explanation:

using distribution property:

7×2 + 7×-3i + 4i×2 + 4i×-3i=

14 -21i +8i + (-12 × -1) _ (i×i equals i² which equals -1)

14 -21i +8i + 12=

26-13i