Help with this question please :)

I wish u could say this to maths:

@animeamanda1412 someone needs ur help

Any help with question 4 would be much appreciated! How do you find the points of intersection?

Thanks

lmaoo, i can never say that
im always gonna be like "maths, forever saty a cute little baby so i can always solve your questions"

and yh, what do you need help with?

I wish u could say this to maths:

@animeamanda1412 someone needs ur help

4a - solve for x (factorise) check it can be factorised with discriminant
4b - then put them into the equation of a straight line to find m or something like that
C1

Thanks! For 4a, how would I solve for x?

Thanks! For 4a, how would I solve for x?

That's brilliant! I'd totally be saying that 90% of the time.

You factorise.
Start by y=x^3-4x^2+3x
now what is common to all terms/what can you put outside the brackets?

X is common in all?

yup so that gives:
y=x(x^2-4x+3)
Now this means one root x = 0 (when y= 0 ) Do you see how I got that?You have a quadratic to factorise now, I was hoping you could do that on your own to get the other two roots?
(x^2-4x+3)
Is this helping - I don't want to feed you answers without explanations if you see what I mean?

I understand how we get to x(xˆ2-4x+3) but from there I'm lost.

Sorry

So y= x(xˆ2-4x+3) yep?Now if we seperate them into two parts, where the x intercepts are, y = 0
Therefore 0=x(xˆ2-4x+3)
Here you can find out that either x=0 (from the coefficient infront of the bracket)
or 0=(xˆ2-4x+3)

So you must factorise xˆ2-4x+3
Can you factorise or do you want to learn the Cheese way

(x-3) (x-1)

I don't know where all my GCSE knowledge has gone, how did I manage to get an A* at GCSE and not know anything now?!? :P

yep you got it, so three roots are?
Are you good now? I've got to go and tackle C3 myself
Good on you Just do a bit of revision, should be fine

+1
+3
and emmm???

Do you know what this topic would be called?

Thanks

Factorising/solving a quadratic equation
and x=0