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    y=x^2+x+1 and y=x

    Do I just have to factorise the quadratic??
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    (Original post by rb16)
    y=x^2+x+1 and y=x

    Do I just have to factorise the quadratic??
    c1? looool more like fp1
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    Just make the x^2+x+1 equal to the x (as they both equal y), move the terms across and then factorise
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    (Original post by ProbablyJade)
    Just make the x^2+x+1 equal to the x (as they both equal y), move the terms across and then factorise
    whats the answer then ?
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    (Original post by ProbablyJade)
    Just make the x^2+x+1 equal to the x (as they both equal y), move the terms across and then factorise
    I did that and it gives my x^2 +1 , but how do I solve the quadratic
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    (Original post by rb16)
    I did that and it gives my x^2 +1 , but how do I solve the quadratic
    the question is wrong because the answer would be x=i but as youre saying its c1 i doubt thats an actual question
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    (Original post by rb16)
    I did that and it gives my x^2 +1 , but how do I solve the quadratic
    are you sure its no minus 1? Because then you could do (x+1)(x-1) = 0
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    (Original post by robinhood111)
    the question is wrong because the answer would be x=i but as youre saying its c1 i doubt thats an actual question
    Yeah I think the question is wrong, we haven't done imaginary numbers in core
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    (Original post by ProbablyJade)
    are you sure its no minus 1? Because then you could do (x+1)(x-1) = 0
    It definitely positive
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    (Original post by rb16)
    Yeah I think the question is wrong, we haven't done imaginary numbers in core
    Same thoughts here. I agree too. You would have x being a complex number.
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    y = x^2 + x + 1
    y = x

    therefore
    x = x^2 + x + 1
    (- x) 0 = x^2 + 1
    x^2 = -1

    the equation breaks there for a c1 student, i.e. question's wrong
 
 
 
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