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Mathematics
Adam Morris
1 June, 14:35
How do you solve this?
(5+i) (5+2i)
+2
Answers (
1
)
Sunday
1 June, 17:03
0
23 + 15i
Step-by-step explanation:
Multiply the binomials in the usual way, then replace i² by - 1 and simplify.
(5 + i) (5 + 2i) = (5) (5) + (5) (2i) + (i) (5) + (i) (2i) = 25 + 10i + 5i + 2i²
= 25 + 15i + 2 (-1)
= 23 + 15i
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