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# Help with C1 Maths Edexcel Watch

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1. I know that if it has real roots the discriminant must be > 0, but the text book says the answer is < or the same as the value of x, help please?
2. Not sure what your textbook is on about - maybe we are both missing something?
3. (Original post by dfbenjamin)
Not sure what your textbook is on about - maybe we are both missing something?
Yeah I don't get why it's equal to - I'lll have to ask my teacher tomorrow
4. (Original post by jessnoch)
Yeah I don't get why it's equal to - I'lll have to ask my teacher tomorrow
Oh you mean that you have k<=16/5? I think that's because you can sometimes consider a double root to be 2 roots instead of 1. I thought you meant the answer was k<=x which would be really confusing!
5. (Original post by dfbenjamin)
Oh you mean that you have k<=16/5? I think that's because you can sometimes consider a double root to be 2 roots instead of 1. I thought you meant the answer was k<=x which would be really confusing!
Ohhh okay thankyou!
6. (Original post by jessnoch)
Ohhh okay thankyou!
No problem - check with your teacher tomorrow anyway since it could be a defined thing in your course that you're assumed to know.

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Updated: October 6, 2016
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