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Is calculus available as a tool for this?

I dun think it need calculus.....

No, but it would be quite straightforward if you used it.

okay, well that sounds like there's a particular way you're supposed to do it. What class is it?

Polynomial/

somtething like:
http://www.stpmwiki.com/index.php/Polynomials_Part2

and
http://www.stpmwiki.com/index.php/Polynomials_Part1

whoa whoa whoa. Are you looking for a range or a remainder?

i duno which part can be use to find the range :( but i know the syllabus is just in that 2 webpage

find the range for the fraction possible

Thank you veryyyy much!!

since, x is real, \(b^2 - 4ac >= 0 \)
=>
\((2+k)^2 - 4(k-3)(1+2k) >= 0\)
\((k-4)(k+4/7) >= 0\)

np :)