this post was submitted on 24 Nov 2025
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[–] sem@lemmy.blahaj.zone 2 points 1 week ago (8 children)

I get that straight is a straight line, and "cosexual" is the cosine function, but can someone explain the joke for the other two?

[–] gegil@sopuli.xyz 5 points 1 week ago (7 children)

For y = x^2, both x and -x equal to the save value of y.

For example: 2^2 = -2^2 = 4.

For the y = sqrt(x), for every positive value of x, there is positive and negative value of y.

For example: sqrt(4) = -2 = 2.

[–] sem@lemmy.blahaj.zone 1 points 1 week ago* (last edited 1 week ago) (5 children)

I guess I have no idea how the math symbols are supposed to relate to sexual orientation. Can you help with that part?

Also, IIRC square root of 4 has only one answer: 2, but negative 2 squared is equal to 4. The functions are asymmetric that way? Is that incorrect? This is all from vague memories of high school and college math.

Does the square root function always give a positive and negative answer? And we in society just kind of forgot about the negative one?

[–] stingpie@lemmy.world 2 points 1 week ago

The square root function only has a single answer for every x. This is intentional. The technical definition of function means there can only be a single y value for every x value. Of course, there are situations where you need to consider the positive and negative square root, and that's why the quadratic equation has the ± symbol.

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