3 marker

[eternal flicker]

been a while help p;ease

is this called a parabola

[pale pivot]

Yea

[eternal flicker]

hi can you guide me through this

[pale pivot]

You got the intersections with the x axis

[eternal flicker]

-3,0 3,0

[pale pivot]

So the equation of the curve would be (x–3)(x+3)

[eternal flicker]

because roots

oh

[pale pivot]

You can see if you equate that to 0 you'll get the roots

But that's not it

[eternal flicker]

yup im remembering it now

[eternal flicker]

the 18

[pale pivot]

Yea so if you take that as the equation of the curve and expand it you'll find that the constant doesn't match the y intercept

That's because there is still a factor

And that factor won't affect the roots cause It'll just get cancelled when equating to 0

But it'll affect the y intercept

[eternal flicker]

yesyes

[pale pivot]

Yea so if you expand (x+3)(x–3) the constant is 9

You need a 2 to get 18

[eternal flicker]

so it is 2before

2(x+3)(x–3)

[pale pivot]

Yea exactly

[eternal flicker]

ily man

but

[pale pivot]

You must always assume that there is a factor when finding the equation of curves like that

[eternal flicker]

i will now assume

[eternal flicker]

-3 and 3 is -9

how is constant +9

[pale pivot]

Oh yea you're correct

My bad

Its –2

[eternal flicker]

but it would work positive 2 if it was 2(3-x)(3+x)

[pale pivot]

You could even see that the parabola is facing downwards

[eternal flicker]

omg we just mathed together

[pale pivot]

Yea well it depends on how you initially write it

[eternal flicker]

yeash

but -2 is right

because ebola is down

negative

[pale pivot]

Yea the coefficient of x^2 must be negative

So –2

[eternal flicker]

I struggle with these terms, how do you learn it?

[pale pivot]

Like what

[eternal flicker]

I know the meaning roughly but how do you learn it

coefficient

terms

ebola

[pale pivot]

I never really sat down and learned it it just came by practice

[eternal flicker]

Oh right, makes sense

[pale pivot]

It's isnt that crucial yk

[eternal flicker]

Ok cool

[pale pivot]

And idk what ebola is 😂

[eternal flicker]

No I meant parabola

[pale pivot]

Is that the inverted parabola

[pale pivot]

Oh yea alr

[eternal flicker]

no its just funny name

but not a funny disease

its a serious disease

[pale pivot]

😂😂

Nah bro ik that

[eternal flicker]

anyways thank you so much

have a great night 🤟

[pale pivot]

No worries