sstrike's answer to joy's Secondary 3 A Maths Singapore question.

done {{ upvoteCount }} Upvotes
clear {{ downvoteCount * -1 }} Downvotes
sstrike
Sstrike's answer
5382 answers (A Helpful Person)
Try...
joy
Joy
11 months ago
i don’t understand ur working for part b
sstrike
Sstrike
11 months ago
Review the textbook about quadratic discriminant properties