Question

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Which expression is equivalent to (7+4i)+(8+i)
(
7
+
4
i
)
+
(
8
+
i
)
?

15−5i
15
−
5
i
5+0i
5
+
0
i
15+5i
​
15
+
5
i
20+0i

Answer 1

Simplify

7 + 4i + 8 + i

Collect like terms

(7 + 8) + (4i + i)

Simplify

C. 15 + 5i