Using sum of roots and etc for various questions. (1 Viewer)

[jamesfirst]

eg. 2008 7 a) requires you to use sum of roots to solve it......


how do you exactly know when to use what in a question that is totally different topic ??? Like discriminants, sum of roots, etc... how do you know when to use them in a question like projectiles.......


omg

 

[UnrealAnchovies]

eg. 2009 7 a) requires you to use sum of roots to solve it......


how do you exactly know when to use what in a question that is totally different topic ??? Like discriminants, sum of roots, etc... how do you know when to use them in a question like projectiles.......


omg

considering they've shown you the solution is t1 + t2 and t1t2, the only plausible method would be sums and products

you just know from experience

 

[jamesfirst]

dayum ..........................


is it just me or is 2008 mx1 paper ridiculously hard ?