√-1 = ? | Square roof from -1 | Math 01/18
A very common problem for students is to find √-1, or the square root from -1. Almost 90% of students fail to explain, what is going on there.
In this lecture, I will explain how to solve a problem like a square root from -1 and what answers can be there.
You can always tell me, that this lecture is different from what I was telling before here: • Complex numbers | Imaginary numbers |... , but really, it is not. In the previous lecture, I introduced the general idea of the complex number “i” and now I’ve made a full investigation of square roots from some negative numbers as a more general idea.
M̲̲y̲ l̲e̲c̲t̲u̲r̲e̲s̲:
▶ Math / 01 – Complex numbers: • Math / 01 - Complex numbers
▶ All mathematics lectures: • Mathematics lectures
▶ Text version: http://mycoding.uk/a/proper_square_ro...
Lecture content:
0:00 – √-1 = ?
0:27– How to solve √-1 =?
1:30 – Two solutions
2:30 – Final answer for √-1
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#complexnumbers #squareroot #mathematicalanalysis