(→Perform Operation) |
(→Perform Operation) |
||
| Line 12: | Line 12: | ||
<math> 7*i \times (7 - 3*i) = 49*i - 21*i^2 = 49*i - 21*(-1) = 21 + 49*i</math> | <math> 7*i \times (7 - 3*i) = 49*i - 21*i^2 = 49*i - 21*(-1) = 21 + 49*i</math> | ||
| + | |||
| + | |||
| + | <math>(3 + 2*i)^2 + (4 - 3*i) = (9 + 6*i + 6*i + 4*i^2) + (4 - 3*i) = 9 - 4 + 4 + 12*i - 3*i = 9 + 9*i</math> | ||
Revision as of 06:13, 3 September 2008
Find Conjugate
$ 5 - 3*i = 5 + 3*i $
$ 21 + 15*i = 21 - 15*i $
Perform Operation
$ (2 + 3*i) - (6 - 4*i) = -4 + 7*i $
$ 7*i \times (7 - 3*i) = 49*i - 21*i^2 = 49*i - 21*(-1) = 21 + 49*i $
$ (3 + 2*i)^2 + (4 - 3*i) = (9 + 6*i + 6*i + 4*i^2) + (4 - 3*i) = 9 - 4 + 4 + 12*i - 3*i = 9 + 9*i $
