Need some urgent help to do with math?

Discussion in 'General Off-Topic Chat' started by gifi4, Dec 6, 2011.

Dec 6, 2011
  1. gifi4
    OP

    Member gifi4 How am I a 'New Member'?

    Joined:
    Apr 21, 2010
    Messages:
    2,352
    Location:
    Melbourne
    Country:
    Australia
    Hey guys, I just need these questions explained as I don't understand it, it's an assessment and I've got no idea what to do.
    Warning: Spoilers inside!
     
  2. zeromac

    Member zeromac Finally reached 1000 posts EXACTLY

    Joined:
    Mar 7, 2009
    Messages:
    2,194
    Location:
    Earth
    Country:
    Australia
    Have you learnt about Quadratic Trinomials yet? Solving them with the Null Factor Law? Basically this is all substituting numbers in
     
  3. Saken

    Member Saken GBAtemp Fan

    Joined:
    Sep 12, 2009
    Messages:
    347
    Country:
    Australia
    This is very easy..
    If it's an assignment you shouldn't expect people to do it for you.

    For a) just sub 25m/s in for v, then let h = 0. Solve the equation for t and you will get two answers. One will very obviously be 0 (t = 0)

    The rest basically follows this structure. Sub in values and solve for the unknown variable. I expect this to be, what, year 8 work?
     
  4. zeromac

    Member zeromac Finally reached 1000 posts EXACTLY

    Joined:
    Mar 7, 2009
    Messages:
    2,194
    Location:
    Earth
    Country:
    Australia
    Actually Quadtratic Equations and solving them are Year 9 course

    I'll just write out the steps for Q A:

    [Sub in 25 for v and 0 for h]
    (25)t^2 - 5t^2 = 0
    5t^2 - 25t^2 = 0
    5t(t-5) = 0
    t = 0 OR t = 5
     

Share This Page