Imaginary Numbers | MathHelp.com - By MathHelp.com
Transcript
| 00:0-1 | to simplify the square root of -25 , think of | |
| 00:04 | the square root of negative 25 as the square root | |
| 00:08 | of negative one Times The Square Root of 25 . | |
| 00:14 | Yes . And remember that the square root of negative | |
| 00:18 | one can be represented by the imaginary number I . | |
| 00:22 | So we have I times the square root of 25 | |
| 00:28 | Or I times five , Which can be rewritten as | |
| 00:34 | five I mm . So the square root of negative | |
| 00:42 | 25 simplifies to five i . |
Summarizer
DESCRIPTION:
This lesson covers estimating quotients. Students learn to estimate a product or quotient by first rounding each number to one non-zero digit. For example, to estimate 8,291 x 27, first round 8,291 down to 8,000, and round 27 up to 30, then multiply 8,000 x 30 to get 240,000.
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