Question

In the complex number system, which of the following is equal to

Answer 1

Step-by-step explanation:

(14+2i)(7+12i)=14×7+14×12i+2i×7+2i×12i

=98+168i+14i−24

=74+182i

Answer 2

Answer:

C) $122+154i$

Step-by-step explanation:

$(14-2i)(7+12i)\\\\(14)(7)+(14)(12i)+(-2i)(7)+(-2i)(12i)\\\\98+168i-14i-24i^2\\\\98+154i-24(-1)\\\\98+154i+24\\\\122+154i$

Therefore, C is correct. Recall that $i^2=-1$