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good morning to all the very smart engineers over at google
@ashfurrow technically the minus sign is a multiplication with -1, therefore it could make sense that it has lower precedence than exponentiation.
Wolfram Alfa gives the same result (even for -3^2), and they are math guys.
@ytg @ashfurrow Precedence rules are PEMDAS:ParenthesesExponentsMultiplicationDivisionAdditionSubtraction
So the calculator query shows "-(3 squared)" which is -9.
You have to type "(-3) squared" to get 9.
@cj @ytg it’s really a question of changing language into symbolic math; I think most people would say the answer should be 9, but language is always ambiguous. If I use a calculator and press the buttons “-“, “3”, and “x^2”, the answer is indeed 9.
@ashfurrow @cj @ytg Not in whatever calculator I appear to have on Ubuntu. pressing '-', '3', and 'x^2' yields -9.
When I use parens around -3, I get 9.
@rcode3 @cj @ytg the iOS calculator app handles this properly, and iirc, my TI-83 did as well.
Again, this is all the ambiguity of language. There's no "correct" answer, but some answers are more correct than others.
@cj @ytg is it a multiplication by -1? I consider “-3” to be its own number unto itself. But again, language :)
@ashfurrow negative numbers don't exist. 😉
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