Sqrt(-1) is still wrong tho. I'm commuting a sin by writting it. Correct expression is i^2=-1
this post was submitted on 21 Aug 2025
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Wouldn't the square root just give plus/minus i? Seems correct enough.
No. The symbol √ signifies the principal square root of a number. Therefore, √x is always positive. The two roots of x, however, are ±√x. If you therefore have y²=x and you want to find y, you mustn't write y=√x, but rather y=±√x to be formally correct.
But (-i)^2=-1 as well. So we still need a convention to distinguish i from -i.
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They’re the same thing. You just take the square root of both sides to get i = sqrt(-1).
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The problem is those morons haven’t taken any of the advanced classes and probably got D’s in the basic ones.
Always wear your glasses. Sans glasses, I read the Advanced Math panel saying the square root of -1=1, and thought, "that's doesn't sound right."