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# C1 simultaneous equation help!! watch

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

Do I just have to factorise the quadratic??
2. (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
3. Just make the x^2+x+1 equal to the x (as they both equal y), move the terms across and then factorise
Just make the x^2+x+1 equal to the x (as they both equal y), move the terms across and then factorise
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
6. (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
7. (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
8. (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
are you sure its no minus 1? Because then you could do (x+1)(x-1) = 0
It definitely positive
10. (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.
11. 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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