Eric Nicholas K's answer to idununderstandasinglething's Secondary 3 A Maths Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Alternative idea is to recognise that a perfect square will only have equal roots.
The only way when x2 - 4x + c = 0 has equal roots is when c = 4. We can see this by using the discriminant (as per what the other tutors wrote) or using completing the square.
There you have it, p = 16.
The only way when x2 - 4x + c = 0 has equal roots is when c = 4. We can see this by using the discriminant (as per what the other tutors wrote) or using completing the square.
There you have it, p = 16.
Date Posted:
4 years ago
360 Tutoring Program