ickplant@lemmy.world to Lemmy Be Wholesome@lemmy.world · 3 years agoWholesome math teacherlemmy.worldimagemessage-square4linkfedilinkarrow-up114arrow-down10
arrow-up114arrow-down1imageWholesome math teacherlemmy.worldickplant@lemmy.world to Lemmy Be Wholesome@lemmy.world · 3 years agomessage-square4linkfedilink
minus-squareTheGreenGolem@lemm.eelinkfedilinkarrow-up0·3 years agoIt’s so strange that it was always taught me as a²+b²+2ab. Of course I know it doesn’t matter, but still strange to see it this way.
minus-squarefunnystuff97@lemmy.worldlinkfedilinkarrow-up0·3 years agoIt makes more sense to me because, when binomials are taught, it’s usually in the form of a variable and a constant. E.G. a = x, b = 3: (x + 3)^2. When expanded, that’s usually x^2 + 6x + 9, and not x^2 + 9 + 6x.
minus-squareTheGreenGolem@lemm.eelinkfedilinkarrow-up1·3 years agoExactly, you are going to lower and lower powers. (Is power the word in English here?) ax², bx¹, cx⁰
It’s so strange that it was always taught me as a²+b²+2ab. Of course I know it doesn’t matter, but still strange to see it this way.
FOIL reading left to right.
It makes more sense to me because, when binomials are taught, it’s usually in the form of a variable and a constant.
E.G. a = x, b = 3: (x + 3)^2. When expanded, that’s usually x^2 + 6x + 9, and not x^2 + 9 + 6x.
Exactly, you are going to lower and lower powers. (Is power the word in English here?)
ax², bx¹, cx⁰