Question

Simplify (8 + 7i) + (2 − i).

10 + 6i

16

4

10 + 8i

Answer 1

Simplify \[(8 +7i) + (2 - 1)\]

Answer 2

\((a+bi)+(c+di)=(a+c)+i(b+d)\)

Answer 3

wait is that -1 or -i ?

Answer 4

oops, it - i

Answer 5

wrote it wrong sorry

Answer 6

\[(8 + 7i) + (2 - i) \]

Answer 7

you can just think of this as like algebra, treating \(i\) as a variable like \(x\), just add like-terms :)

Answer 8

(8 + 7i) + (2 - i)
+i +i
(8 + 8i) + 2

Answer 9

then -2?

Answer 10

o_o I'm not sure what you did there. It is much simpler than what you may think. Imagine the problem is written as \((8+7x)+(2-x)\) and imagine \(x=i\)

Answer 11

so it's 10 + 6i

Answer 12

\(\checkmark\_\checkmark\)

Answer 13

i suck at math, that's what i did :D

Answer 14

ya 10+6i is perfect ;) hehe.

Answer 15

thanks!

Answer 16

np!