Jia Earn Lim's answer to Yu Ann's Secondary 3 A Maths Singapore question.

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Jia Earn Lim
Jia Earn Lim's answer
96 answers (Tutor Details)
1st
Note that for (i) discriminant has to be greater than or equal to zero which includes the case where there are 1 real root or 2 real roots. I provided some notes in red for the solving inequality portion, hope they help :)