fossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 7 months agoteachingsmander.xyzimagemessage-square65fedilinkarrow-up1705arrow-down116
arrow-up1689arrow-down1imageteachingsmander.xyzfossilesque@mander.xyzM to Science Memes@mander.xyzEnglish · 7 months agomessage-square65fedilink
minus-squareh3ndrik@feddit.delinkfedilinkEnglisharrow-up20·edit-27 months agox^2 = 9 <=> |x| = sqrt(9) would be correct. That way you get both 3 and -3 for x. That’s the way your math teacher would do it. So the correct version of the statement in the picture is: “if x^2 = 9 then abs(x) = 3”
minus-squareUnRelatedBurner@sh.itjust.workslinkfedilinkEnglisharrow-up3·7 months agoCool! Makes sense to me. Honestly, I’ve never done it this way, but it’s so clean. Love it. Thanks.
x^2 = 9
<=>
|x| = sqrt(9)
would be correct. That way you get both 3 and -3 for x.
That’s the way your math teacher would do it. So the correct version of the statement in the picture is: “if x^2 = 9 then abs(x) = 3”
Cool! Makes sense to me. Honestly, I’ve never done it this way, but it’s so clean. Love it. Thanks.