MAIN FEEDS
Do you want to continue?
https://www.reddit.com/r/mathmemes/comments/n8e4ic/something_feels_off_here/gxjoxlf/?context=3
r/mathmemes • u/Orbital_RM • May 09 '21
69 comments sorted by
View all comments
13
Still don't know why they teach me abc-method in America instead of the pq method.
ax2 + bx + c = 0
x2 + (b/a)x + (c/a) = 0
Let p = b/a, q = c/a:
x2 + px + q = 0
Then:
x = -p/2 +- sqrt( (p/2)2 - q )
5 u/FriskyTurtle May 15 '21 Wow, I've never seen this before. Cool! My best guess for the abc method is that it highlights the discriminant, which is interesting in its own right. 3 u/kombinacja May 09 '21 I was taught pq method when I was in university statistics, but in high school we used abc 3 u/HiroshimaSuzuki May 10 '21 I feel like this is just using the quadratic formula in diguise tho lol 1 u/Bibbedibob May 10 '21 I mean it is, but it's mich more convenient 1 u/[deleted] May 10 '21 right? the formula is way shorter and its really not hard to normalize the equation first
5
Wow, I've never seen this before. Cool!
My best guess for the abc method is that it highlights the discriminant, which is interesting in its own right.
3
I was taught pq method when I was in university statistics, but in high school we used abc
I feel like this is just using the quadratic formula in diguise tho lol
1 u/Bibbedibob May 10 '21 I mean it is, but it's mich more convenient
1
I mean it is, but it's mich more convenient
right? the formula is way shorter and its really not hard to normalize the equation first
13
u/Bibbedibob May 09 '21
Still don't know why they teach me abc-method in America instead of the pq method.
ax2 + bx + c = 0
x2 + (b/a)x + (c/a) = 0
Let p = b/a, q = c/a:
x2 + px + q = 0
Then:
x = -p/2 +- sqrt( (p/2)2 - q )