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# C1 Help needed !!

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1. How to solve this ??
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2. ??
3. (Original post by egoclips)
??
this
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4. (Original post by NNB_Herath)
this
Oh i'm trying in registration at school now
5. (Original post by NNB_Herath)
this

You could rearrange to 10x^1/2=x+9 and square both sides.
Or let k=x^1/2 and get a quadratic in k.
Or just solve it like it is above as a quadratic in x^1/2
6. let
so,

And go from there.
7. let y=x^(1/2)

therefore, 10y -y^2 -9,

= -y^2 +10y -9

=???

gonna catch a lesson
8. @physicsmaths

Thanks@NotNotBatmanThanks
9. (Original post by NotNotBatman)
let
so,

And go from there.
Thanks a lot )
10. (Original post by NNB_Herath)
Thanks a lot )
No problem.
11. (Original post by NNB_Herath)
@physicsmaths

[email]Thanks@NotNotBatmanThanks
No prob

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