Ask Singapore Homework?
Upload a photo of a Singapore homework and someone will email you the solution for free.
Question
secondary 2 | Maths
3 Answers Below
Anyone can contribute an answer, even non-tutors.
Help ASAP
Date Posted: 1 year ago
Views: 122
See 3 Answers
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope this helps
Date Posted:
1 year ago
Why is it that we start from ay, then suddenly it becomes 3ay
If we had taken 3ay at the start we would not have a perfect square to apply the a2 - b2 = (a+b)(a-b) formula. 225 is a square but 75 is not, that’s why the pulling out of 3 can only be done later
I just realised I could have pulled out 9ay at step 1, that would have made it less confusing although at the end the answer is the same. sorry about that, hope this helps
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope this helps
Date Posted:
1 year ago
360 Tutoring Program