Asked by lisa
Simplify the expression:
(2 + 6⋅i)(-1 + 6⋅i)
(2 + 6⋅i)(-1 + 6⋅i)
Answers
Answered by
Bosnian
( 2 + 6 i ) ( - 1 + 6 i ) =
( - 1 ) * 2 + ( - 1 ) * 6 i + 6 i * 2 + 6 i * 6 i =
- 2 + ( - 6 i ) + 12 i + 36 i ^ 2 =
- 2 - 6 i + 12 i + 36 * i ^ 2 =
- 2 - 6 i + 12 i + 36 * ( - 1 ) =
- 2 - 6 i + 12 i - 36 =
6 i - 38
( - 1 ) * 2 + ( - 1 ) * 6 i + 6 i * 2 + 6 i * 6 i =
- 2 + ( - 6 i ) + 12 i + 36 i ^ 2 =
- 2 - 6 i + 12 i + 36 * i ^ 2 =
- 2 - 6 i + 12 i + 36 * ( - 1 ) =
- 2 - 6 i + 12 i - 36 =
6 i - 38
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