Edi's answer to mary's Secondary 2 Maths Singapore question.
done
{{ upvoteCount }} Upvotes
clear
{{ downvoteCount * -1 }} Downvotes
Hope this helps
Date Posted:
1 year ago
Hi, thank you. May I check if I can let y+100=a and y-100=b
Then (y+100)² - (y-100)²
(using a²-b²=a-b, a+b)
If so, how do I continue from (y+100)² - (y-100)²
Then (y+100)² - (y-100)²
(using a²-b²=a-b, a+b)
If so, how do I continue from (y+100)² - (y-100)²
Very good thinking! Refer to the other photo!
360 Tutoring Program