Everytime I struggle with my algebra, I come here. I do online school so it's hard to move forward when I'm stuck without my teacher getting back to me (especially since I'm a night owl. I normally have to wait until the following day). Thank you! I'm bad with numbers but when I watch these videos they (sort of) make sense.
does anyone have answers to a sheet where we have to solve questions and its called the Focus and Directrix of a Parabola and its a leprechaun drawing on the back
Yes the difference is the formula he is showing gives the parabola for all possible quadrants. (Y-k)^2=4p(x-h) is used only on horizontal Parabolas and you can reverse it with (x-h)^2=4p(y-k) for vertical ones.
How do we find the focus or the directrix when the vertex is (4,0) and solving for y=? I can’t find anywhere that answers this. My question is to find if there is a minimum or maximum of the equation y=(x+4)squared.
Because of this parabola I lost my childhood and teenage days
WHY? xD
@@saedcruzreyes5092 the first video in this series was uploaded 12 years ago to the day I’m writing this and this video came out 6 years later
Everytime I struggle with my algebra, I come here. I do online school so it's hard to move forward when I'm stuck without my teacher getting back to me (especially since I'm a night owl. I normally have to wait until the following day). Thank you! I'm bad with numbers but when I watch these videos they (sort of) make sense.
Ryann Elizabeth
Same here. But i m not a online student.
5:21
**Right side of the screen exists**
Sal: it's free real estate
thats when you know that sal loves realestate
Dang it, you beat me to it
when your teacher gives you a question on a test that he has never covered...
"hairy algebra"
can we just
"Hairy algebra" he says.
I like my problems nice and hairy
5:20 "Let me give myself a little bit real estate over here" lol
Thanks Salman khan to create this Educational Organization!
Thank you! I was in need of such a video for computing voronoi diagrams in my project
Really fantastic Sal. Thank you so much.
Define childhood ..... do I remember parabolas from my childhood? ✨📚🍨🍉
Thank you so much man ! You are fantastic
my brain can’t handle this- what did he just do
Thanks I will just memorize it
" Hairy algebra" *Shivers*
Fascinating indeed
crying and laughing at the same time. lol "hairy algebra" it is!
does anyone have answers to a sheet where we have to solve questions and its called the Focus and Directrix of a Parabola and its a leprechaun drawing on the back
Thank you !!!
tnx alot !!!!!!!!!!
what if the equation of dirctrix includes 'x' also?
In that case the principle axis of the parabola will lie at some angle to the x axis and perpendicular to the directrix.
How do I find the equation of the ellipse given only that the the major axis is vertical and the graph passes through the vertex of a parabola?
love yall
Take a shot for every “hairy algebra” 😂
Which software do you use to write everything?
The link under (Missed the previous lesson?) is broken.
for what grade is this mainly on? like 8th, 9th, 10th etc.
11th I believe
@@saedcruzreyes5092 bruh i am in 8th grade
How would you find the focus using the formula that we arrived at the end of the video?
hey thanks !!
the point in last was the coordinate (x,y) or (a,b)
If you ask about focus (1,2) then it is (a,b)
I watched another video regarding this. It demonstrated another formula (y-k)^2=4p(x-h) Is this formula applicable?
I think that's the case 3 and 4
Yes the difference is the formula he is showing gives the parabola for all possible quadrants. (Y-k)^2=4p(x-h) is used only on horizontal Parabolas and you can reverse it with (x-h)^2=4p(y-k) for vertical ones.
THE PAIN!!
tnx
"It looks really hairy." HAHAHA
nice
how can we find the equation of a hyperbola given the focus and directrix
commenting on 6year old comment
sir how's life going?
isn't that supposed to be
a - x ?
How do we find the focus or the directrix when the vertex is (4,0) and solving for y=? I can’t find anywhere that answers this. My question is to find if there is a minimum or maximum of the equation y=(x+4)squared.
There is a min of 0 and max is ♾
1:29
What’s the purpose of using the distant formula here?
2:08
And what do you mean negative? The final answer will be negative or will the y variable be the negative variable instead of the x variable?
hola que tal, como les va
I’m a little stupid so I’d like to know how you got “-2yk”
As you can see (y-k)^2 =y^2+k^2-2yk , it's just a simple expanding formula
The directrix cannot be y=k since k is the why coordinate of the vertex >_
That formula applies to ALL parabolas?
Kella Boiarddi Yes
y-k then y=k so it means its 0?
what if directrix is x = a
This makes no sense
Why ?? 😂
Shouldn't it be (a-x)2+(b-y)2 instead of (x-a)2+(y-b)2
In both cases answer will be same as it contains square .
yes, thank you.
i dare you to prove parabola opens left
lumilipad nanaman ang isip ko
Hate math!!!!
Sus 😳😳
not helpful
I’m from the future even more cooked