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Problem 2 Medium Difficulty

For $i=\sqrt{-1},$ what is the sum $(7+3 i)+(-8+9 i) ?$
A) $-1+12 i$
B) $-1-6 i$
C) $15+12 i$
D) $15-6 i$

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Video Transcript

Okay, So if we want to add these, we want to be sure to line up the real and the imaginary component's gonna say seven plus B I this negative eight last night. I we know we're going at them because it says something, which means to atthe so then seven minus eight is just negative one than three. I plus nine. I was gonna be twelve, I so it's gonna be okay.