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Completing the square help with coefficient other than 1 please help watch

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    (Original post by WilliamSlim)
    Woah huge help dude thanks, but what happens to the 5 in the red/second question? I swear my teacher said we couldn't just make the number disappear when we are factoring it.
    In the red question I did not factor, I divided through by 5 ... I could do this because it was an equation and I could do 0 divide by 5 still equals 0 ... You MUST have an equation to divide through so you CANNOT do this with the green question as there is no equation ... Hence the need to factorise instead
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    Hey mate had a go at a bunch of simultaneous equations and this is the only one where I have to idea how to get the correct answer
    http://i.imgur.com/kBVmo8eh.jpg
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    (Original post by WilliamSlim)
    Hey mate had a go at a bunch of simultaneous equations and this is the only one where I have to idea how to get the correct answer
    http://i.imgur.com/kBVmo8eh.jpg
    Hi

    The question says -33 all your working uses 33
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    Man I was too embarrassed to reply before. Anyways on y^4-5y^2-36>0 how do I know whether the sorry I mean why is it +3 and -3 and not +-2?
 
 
 
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