Question #ea8c2
1 Answer
Assuming that you mean an imaginary number, this is true.
Explanation:
Essentially, you can't square root a negative number, because if you multiply two negative numbers together you get a positive number. (Try
Mathematicians weren't going to let a little thing like impossibility get in their way, so they decided to use imagination.
Basically, we let
This is very useful when solving quadratic equations for example.
Try solving
now you can't really get the square root of negative
graph{x^2-5x+8 [-5, 10, -5, 10]} notice how the graph of this equation doesn't cross the x-axis. This is because it has no real roots as both the roots are imaginary - they have