Comment on I dunno

Truscape@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

• ftbd@feddit.org ⁨1⁩ ⁨month⁩ ago

  That’s not even an equation, just basic algebra

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  • Cethin@lemmy.zip ⁨1⁩ ⁨month⁩ ago

    Technically not algebra, right? Algebra is where you move things around and solve for variables, and that kind of thing. This is just arithmetic.

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    • ftbd@feddit.org ⁨1⁩ ⁨month⁩ ago

      You’re right, that’s what I meant. Fixed it, thanks!

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    • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

      Technically not algebra, right?

      No, it actually is Algebra. The Distributive Law isn’t taught to students until they start on Algebra.

      This is just arithmetic

      There’s no a(b+c) in Arithmetic.

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      • Cethin@lemmy.zip ⁨3⁩ ⁨weeks⁩ ago

        I don’t think you’re right. The wiki page literally uses a similar equation as an example of “elementary arithmetic.” It also uses a similar one, but with variables, as an example in “elementary algebra.” That implies that yes, this is arithmetic, and the introduction of variables is what makes it algebra.

        It doesn’t matter what course finally teaches it to you. That could be just out of convenience, not by definition part of that domain. It’s been ages since I took it, though I could swear I learned this in pre-algebra (meaning before algebra), or earlier. I could be wrong on this though. Again, it’s been a very long time.

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  • Truscape@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

    Fair enough, I’ve heard “math problem” and “math equation” used interchangeably.

    Also you would be surprised how many people do not know basic algebra, at least in the US rofl

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    • upandatom@lemmy.world ⁨1⁩ ⁨month⁩ ago

      You. You are one of them bc you do not know what an equation is.

      There is no algebra here. This is arithmetic.

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      • Truscape@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

        When I made my example, I used an algebraic expression, but yeah, the original question was arithmetic, sorry. Not very good at explaining things XD

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      • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

        You are one of them bc you do not know what an equation is.

        You are one of the people who doesn’t know what a(b+c) is

        There is no algebra here

        Yes there is, 5(8-5).

        This is arithmetic

        There’s no a(b+c) in Arithmetic

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  • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

    That’s not even an equation, just basic arithmetic

    Basic Algebra actually. Students aren’t taught the Distributive Law until they start on Algebra

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  • MonkderVierte@lemmy.zip ⁨1⁩ ⁨month⁩ ago

    Algebra has horrible syntax. Way too much implications.

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    • Septimaeus@infosec.pub ⁨1⁩ ⁨month⁩ ago

      Implications or assignment? They didn’t specify notation.

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      • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

        Implications or assignment?

        Umm, neither?? 😂

        They didn’t specify notation

        a(b+c)=(ab+ac) is taught in Algebra, The Distributive Law, it can’t mean anything else - it’s the reverse operation to Factorising ab+ac=a(b+c).

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• TheRedSpade@lemmy.world ⁨1⁩ ⁨month⁩ ago

  While I never failed a math class, I also never went last high school. When would your presumptions NOT be true?

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  • Truscape@lemmy.blahaj.zone ⁨1⁩ ⁨month⁩ ago

    Some forms of programming syntax, although there are the fringe cases where an equation is represented by a symbol in conjunction with a parentheses input.

    For example:

    y(x) = 2x+3

    5+y(1) = 10, as 1 is substituted in for x in the prior equation.

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    • TheBlackLounge@lemmy.zip ⁨1⁩ ⁨month⁩ ago

      And in some languages a number can be used as a name of a variable or a function, so it can be anything really

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      • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

        And in some languages a number can be used as a name of a variable or a function

        Not in Maths it can’t

        so it can be anything really

        No, it can only be a Factorised Term, ab+ac=a(b+c). You also can’t call a function by any letter that you’ve used as a pronumeral

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      • MotoAsh@piefed.social ⁨1⁩ ⁨month⁩ ago

        Not in most programming languages, though. You cannot start names with a number. Unless you’re using some strange character that merely looks like a number, anyways. Programming with unicode can get weird but generally works without issue these days.

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    • moriquende@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Wouldn’t we just assume function expressions are always “in parenthesis”? Then it’s just a substitution and no rules were changed.

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      • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

        Wouldn’t we just assume function expressions are always “in parenthesis”?

        No, because factorised Terms also are, ab+ac=a(b+c).

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• Alaknar@sopuli.xyz ⁨1⁩ ⁨month⁩ ago

  Multiplication sign is not required in situations like this. Same with unknowns - you don’t have to write 2*x, you just write 2x.

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• DarkCloud@lemmy.world ⁨1⁩ ⁨month⁩ ago

  I prefer BM-DAS, no one’s out here doing exponents, and no one calls brackets “parentheses”…

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  • cobysev@lemmy.world ⁨1⁩ ⁨month⁩ ago

    The way I was taught growing up, brackets are [these]. Parenthesis are (these).

    Yes, technically the latter are also brackets. But they can also be called parenthesis, whereas the former is exclusively a bracket. So we were taught to call them separate words to differentiate while doing equations.

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    • Droggelbecher@lemmy.world ⁨1⁩ ⁨month⁩ ago

      I’m a theoretical physics grad student and a night school maths teacher, I have never heard this distinction. People in academia around me call them round and square brackets.

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      • tigeruppercut@lemmy.zip ⁨1⁩ ⁨month⁩ ago

        It’s a US vs UK (and probably others) distinction. The ( ) are almost never called brackets in the US, unless it’s a regional thing I’m not aware of. Also the [ ] didn’t get used in any math classes I was in the US up through calculus except for matrices.

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    • DarkCloud@lemmy.world ⁨1⁩ ⁨month⁩ ago

      Yeah, but as an adult it depends entirely on whether you’re in an industry or hobby that requires that level of bracket nuance/exponents.

      Most of us are just trying to remember the basics.

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    • SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

      The way I was taught growing up, brackets are [these]. Parenthesis are (these)

      They’re all brackets. Parentheses is actually the part inside the ().

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  • Deebster@infosec.pub ⁨1⁩ ⁨month⁩ ago

    I learnt it as BODMAS (brackets, orders, division and multiplication, addition and subtraction).

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• SmartmanApps@programming.dev ⁨3⁩ ⁨weeks⁩ ago

  the 5 next to the parentheses indicates multiplication

  No, it indicates Distribution, a(b+c)=(ab+ac), 5(8-5)=(5x8+5x5).

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