Multiply (9+5i)(6+i)?
回答 (5)
2017-10-29 7:22 am
(9 + 5i)(6 + i)
= 49 + 39i
= 49 + 39i
2017-10-29 5:15 am
54 + 9 i + 30 i - 5 = 49 + 39 i
2017-10-29 4:37 am
(9+5i)(6+i)
polynomial multiplication:
9(6+i) + 5i(6+i)
54 + 9i + 30i + 5i² : i² = -1
54 - 5 + 39i
49 + 39i
polynomial multiplication:
9(6+i) + 5i(6+i)
54 + 9i + 30i + 5i² : i² = -1
54 - 5 + 39i
49 + 39i
2017-10-29 4:29 am
Expanding out the brackets
(9 + 5i) (6 + i)
9 x 6 = 54
9 x i = 9i
5i x 6 = 30i
5i x i = 5i²
= 54+9i+30i+5i²
= 54 + 39i + 5i²
(9 + 5i) (6 + i)
9 x 6 = 54
9 x i = 9i
5i x 6 = 30i
5i x i = 5i²
= 54+9i+30i+5i²
= 54 + 39i + 5i²
2017-10-29 4:27 am
54 + 39i - 5
49 + 39i
i^2 = -1
49 + 39i
i^2 = -1
收錄日期: 2021-04-24 00:47:19
原文連結 [永久失效]:
https://hk.answers.yahoo.com/question/index?qid=20171028202438AA1R48P